diff --git a/bsp/apollo2/rtconfig.py b/bsp/apollo2/rtconfig.py
index 579c93b17b..354e5f6389 100644
--- a/bsp/apollo2/rtconfig.py
+++ b/bsp/apollo2/rtconfig.py
@@ -18,9 +18,9 @@ elif CROSS_TOOL == 'keil':
 	PLATFORM 	= 'armcc'
 	EXEC_PATH 	= 'C:/Keil_v5'
 elif CROSS_TOOL == 'iar':
-    print '================ERROR============================'
-    print 'Not support iar yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support iar yet!')
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/avr32uc3b0/rtconfig.py b/bsp/avr32uc3b0/rtconfig.py
index b6004940d9..a9400c6051 100644
--- a/bsp/avr32uc3b0/rtconfig.py
+++ b/bsp/avr32uc3b0/rtconfig.py
@@ -15,14 +15,14 @@ if  CROSS_TOOL == 'gcc':
 	PLATFORM 	= 'gcc'
 	EXEC_PATH 	= 'C:/Program Files/Atmel/AVR Tools/AVR Toolchain/bin'
 elif CROSS_TOOL == 'keil':
-    print '================ERROR============================'
-    print 'Not support keil yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support keil yet!')
+    print('=================================================')
     exit(0)
 elif CROSS_TOOL == 'iar':
-    print '================ERROR============================'
-    print 'Not support iar yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support iar yet!')
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/beaglebone/rtconfig.py b/bsp/beaglebone/rtconfig.py
index a5561f54d3..6cd0b71505 100644
--- a/bsp/beaglebone/rtconfig.py
+++ b/bsp/beaglebone/rtconfig.py
@@ -15,9 +15,9 @@ elif CROSS_TOOL == 'keil':
     PLATFORM 	= 'armcc'
     EXEC_PATH 	= 'C:/Keil'
 elif CROSS_TOOL == 'iar':
-    print '================ERROR============================'
-    print 'Not support IAR yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support IAR yet!')
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/efm32/rtconfig.py b/bsp/efm32/rtconfig.py
index b412851de4..b1bd8330bb 100644
--- a/bsp/efm32/rtconfig.py
+++ b/bsp/efm32/rtconfig.py
@@ -13,14 +13,14 @@ if CROSS_TOOL == 'gcc':
     EXEC_PATH   = 'C:\Program Files (x86)\CodeSourcery\Sourcery G++ Lite\bin'
     #EXEC_PATH  = 'C:\Program Files (x86)\yagarto\bin'
 elif CROSS_TOOL == 'keil':
-    print '================ERROR============================'
-    print 'Not support keil yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support keil yet!')
+    print('=================================================')
     exit(0)
 elif CROSS_TOOL == 'iar':
-    print '================ERROR============================'
-    print 'Not support iar yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support iar yet!')
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/frdm-k64f/rtconfig.py b/bsp/frdm-k64f/rtconfig.py
index baaf4905fa..009b4b71fb 100644
--- a/bsp/frdm-k64f/rtconfig.py
+++ b/bsp/frdm-k64f/rtconfig.py
@@ -17,9 +17,9 @@ elif CROSS_TOOL == 'keil':
 	PLATFORM 	= 'armcc'
 	EXEC_PATH 	= r'C:/Keil'
 elif CROSS_TOOL == 'iar':
-    print '================ERROR============================'
-    print 'Not support iar yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support iar yet!')
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/gd32450z-eval/SConstruct b/bsp/gd32450z-eval/SConstruct
index 42ae8c9646..27ac9b0241 100644
--- a/bsp/gd32450z-eval/SConstruct
+++ b/bsp/gd32450z-eval/SConstruct
@@ -11,8 +11,8 @@ sys.path = sys.path + [os.path.join(RTT_ROOT, 'tools')]
 try:
     from building import *
 except:
-    print 'Cannot found RT-Thread root directory, please check RTT_ROOT'
-    print RTT_ROOT
+    print('Cannot found RT-Thread root directory, please check RTT_ROOT')
+    print(RTT_ROOT)
     exit(-1)
 
 TARGET = 'rtthread-gd32f4xx.' + rtconfig.TARGET_EXT
diff --git a/bsp/gd32450z-eval/rtconfig.py b/bsp/gd32450z-eval/rtconfig.py
index 70ffabba2f..af754e3c75 100644
--- a/bsp/gd32450z-eval/rtconfig.py
+++ b/bsp/gd32450z-eval/rtconfig.py
@@ -13,9 +13,9 @@ if os.getenv('RTT_ROOT'):
 # cross_tool provides the cross compiler
 # EXEC_PATH is the compiler execute path, for example, CodeSourcery, Keil MDK, IAR
 if  CROSS_TOOL == 'gcc':
-    print '================ERROR============================'
-    print 'Not support gcc yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support gcc yet!')
+    print('=================================================')
     PLATFORM    = 'gcc'
 elif CROSS_TOOL == 'keil':
     PLATFORM 	= 'armcc'
diff --git a/bsp/lm3s8962/rtconfig.py b/bsp/lm3s8962/rtconfig.py
index 0a0c98a71d..829120bd3a 100644
--- a/bsp/lm3s8962/rtconfig.py
+++ b/bsp/lm3s8962/rtconfig.py
@@ -18,9 +18,9 @@ elif CROSS_TOOL == 'keil':
 	PLATFORM 	= 'armcc'
 	EXEC_PATH 	= 'C:/Keil'
 elif CROSS_TOOL == 'iar':	
-    print '================ERROR============================'
-    print 'Not support iar yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support iar yet!')
+    print('=================================================')
     exit(0)	
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/lm3s9b9x/rtconfig.py b/bsp/lm3s9b9x/rtconfig.py
index f806ec1e19..d9c51ac722 100644
--- a/bsp/lm3s9b9x/rtconfig.py
+++ b/bsp/lm3s9b9x/rtconfig.py
@@ -18,9 +18,9 @@ elif CROSS_TOOL == 'keil':
 	PLATFORM 	= 'armcc'
 	EXEC_PATH 	= 'C:/Keil'
 elif CROSS_TOOL == 'iar':	
-    print '================ERROR============================'
-    print 'Not support iar yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support iar yet!')
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/lm4f232/rtconfig.py b/bsp/lm4f232/rtconfig.py
index cfe518891b..5e6075ead5 100644
--- a/bsp/lm4f232/rtconfig.py
+++ b/bsp/lm4f232/rtconfig.py
@@ -20,9 +20,9 @@ elif CROSS_TOOL == 'keil':
 	PLATFORM 	= 'armcc'
 	EXEC_PATH 	= r'C:/Keil'
 elif CROSS_TOOL == 'iar':
-    print '================ERROR============================'
-    print 'Not support iar yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support iar yet!')
+    print('=================================================')
     exit(0)	
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/lpc178x/rtconfig.py b/bsp/lpc178x/rtconfig.py
index a0b4243081..a5302bb36f 100644
--- a/bsp/lpc178x/rtconfig.py
+++ b/bsp/lpc178x/rtconfig.py
@@ -15,9 +15,9 @@ elif CROSS_TOOL == 'keil':
 	PLATFORM 	= 'armcc'
 	EXEC_PATH 	= 'C:/Keil'
 elif CROSS_TOOL == 'iar':
-    print '================ERROR============================'
-    print 'Not support iar yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support iar yet!')
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/lpc2148/rtconfig.py b/bsp/lpc2148/rtconfig.py
index 2c44325803..57f7ee46da 100644
--- a/bsp/lpc2148/rtconfig.py
+++ b/bsp/lpc2148/rtconfig.py
@@ -15,9 +15,9 @@ elif CROSS_TOOL == 'keil':
 	PLATFORM 	= 'armcc'
 	EXEC_PATH 	= 'C:\Keil'
 elif CROSS_TOOL == 'iar':
-    print '================ERROR============================'
-    print 'Not support iar yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support iar yet!')
+    print('=================================================')
     exit(0)	
 	
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/lpc2478/rtconfig.py b/bsp/lpc2478/rtconfig.py
index 5e99582469..7464fa0dc4 100644
--- a/bsp/lpc2478/rtconfig.py
+++ b/bsp/lpc2478/rtconfig.py
@@ -15,9 +15,9 @@ elif CROSS_TOOL == 'keil':
 	PLATFORM 	= 'armcc'
 	EXEC_PATH 	= 'C:/Keil'
 elif CROSS_TOOL == 'iar':
-    print '================ERROR============================'
-    print 'Not support iar yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support iar yet!')
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/lpc408x/rtconfig.py b/bsp/lpc408x/rtconfig.py
index a2a6fac53f..ba797aab63 100644
--- a/bsp/lpc408x/rtconfig.py
+++ b/bsp/lpc408x/rtconfig.py
@@ -16,9 +16,9 @@ elif CROSS_TOOL == 'keil':
 	PLATFORM 	= 'armcc'
 	EXEC_PATH 	= 'D:/Keil'
 elif CROSS_TOOL == 'iar':
-    print '================ERROR============================'
-    print 'Not support iar yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support iar yet!')
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/lpc43xx/M0/SConstruct b/bsp/lpc43xx/M0/SConstruct
index c7967d02f6..c0d1d2fdc0 100644
--- a/bsp/lpc43xx/M0/SConstruct
+++ b/bsp/lpc43xx/M0/SConstruct
@@ -29,7 +29,7 @@ if rtconfig.CROSS_TOOL == 'gcc':
     import glob
     # Remove the .o for M0 left on the drivers dir.
     for i in glob.glob(GetCurrentDir() + '/../drivers/*.o'):
-        print 'RM %s' % i
+        print('RM %s' % i)
         os.unlink(i)
 
     if sys.platform.startswith('linux'):
@@ -40,7 +40,7 @@ if rtconfig.CROSS_TOOL == 'gcc':
     else:
         # Assume Windows.
         ocwd = os.getcwdu()
-        print 'TODO: remove the object files in ../Libraries'
+        print('TODO: remove the object files in ../Libraries')
         os.chdir(ocwd)
 
 # do building 
diff --git a/bsp/lpc43xx/M4/SConstruct b/bsp/lpc43xx/M4/SConstruct
index 7b02b732d4..a6390025a3 100644
--- a/bsp/lpc43xx/M4/SConstruct
+++ b/bsp/lpc43xx/M4/SConstruct
@@ -26,14 +26,14 @@ Export('rtconfig')
 objs = PrepareBuilding(env, RTT_ROOT, has_libcpu=False)
 
 if rtconfig.CROSS_TOOL == 'gcc':
-    print 'build M0 code first'
+    print('build M0 code first')
     if sys.platform.startswith('linux'):
         import glob
         ocwd = os.getcwdu()
         os.chdir('../M0')
         res = os.system('scons')
         if res:
-            print 'build M0 exit with code %d\n' % res
+            print('build M0 exit with code %d\n' % res)
             sys.exit(res)
         os.chdir(ocwd)
         res = os.system('cd ../Libraries/; find -name \*.o -exec rm {} \;')
@@ -47,7 +47,7 @@ if rtconfig.CROSS_TOOL == 'gcc':
 
     # Remove the .o for M0 left on the drivers dir.
     for i in glob.glob(GetCurrentDir() + '/../drivers/*.o'):
-        print 'RM %s' % i
+        print('RM %s' % i)
         os.unlink(i)
 
 # do building 
diff --git a/bsp/lpc5410x/rtconfig.py b/bsp/lpc5410x/rtconfig.py
index 555a1b4962..3c0e37fe07 100644
--- a/bsp/lpc5410x/rtconfig.py
+++ b/bsp/lpc5410x/rtconfig.py
@@ -16,9 +16,9 @@ elif CROSS_TOOL == 'keil':
 	PLATFORM 	= 'armcc'
 	EXEC_PATH 	= 'D:/Keil_v5'
 elif CROSS_TOOL == 'iar':
-    print '================ERROR============================'
-    print 'Not support iar yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support iar yet!')
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/lpc824/rtconfig.py b/bsp/lpc824/rtconfig.py
index 7fb0a2e110..906729dfb9 100644
--- a/bsp/lpc824/rtconfig.py
+++ b/bsp/lpc824/rtconfig.py
@@ -11,9 +11,9 @@ if os.getenv('RTT_CC'):
 # cross_tool provides the cross compiler
 # EXEC_PATH is the compiler execute path, for example, CodeSourcery, Keil MDK, IAR
 if  CROSS_TOOL == 'gcc':
-    print '================ERROR============================'
-    print 'Not support gcc yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support gcc yet!')
+    print('=================================================')
 elif CROSS_TOOL == 'keil':
     PLATFORM 	= 'armcc'
     EXEC_PATH 	= 'C:/keil_v5'
diff --git a/bsp/ls1bdev/rtconfig.py b/bsp/ls1bdev/rtconfig.py
index 70077e64ce..4dcbf0bd75 100644
--- a/bsp/ls1bdev/rtconfig.py
+++ b/bsp/ls1bdev/rtconfig.py
@@ -14,9 +14,9 @@ if  CROSS_TOOL == 'gcc':
 	PLATFORM    = 'gcc'
 	EXEC_PATH   = r'C:\Program Files\CodeSourcery\Sourcery G++ Lite For MIPS ELF\bin'
 else:
-    print '================ERROR============================'
-    print 'Not support %s yet!' % CROSS_TOOL
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support %s yet!' % CROSS_TOOL)
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/ls1cdev/rtconfig.py b/bsp/ls1cdev/rtconfig.py
index c08dfc6852..4bf85c0993 100644
--- a/bsp/ls1cdev/rtconfig.py
+++ b/bsp/ls1cdev/rtconfig.py
@@ -15,9 +15,9 @@ if  CROSS_TOOL == 'gcc':
 #	EXEC_PATH   = "/opt/mips-2015.05/bin"
 	EXEC_PATH   = r'D:\mgc\embedded\codebench\bin'
 else:
-    print '================ERROR==========================='
-    print 'Not support %s yet!' % CROSS_TOOL
-    print '================================================='
+    print('================ERROR===========================')
+    print('Not support %s yet!' % CROSS_TOOL)
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/m16c62p/rtconfig.py b/bsp/m16c62p/rtconfig.py
index 494f52ff76..5fb198af6c 100644
--- a/bsp/m16c62p/rtconfig.py
+++ b/bsp/m16c62p/rtconfig.py
@@ -17,9 +17,9 @@ elif CROSS_TOOL == 'iar':
 	IAR_PATH = 'C:/Program Files/IAR Systems/Embedded Workbench Evaluation 6.0'
 #	EXEC_PATH 	= 'C:/Program Files/IAR Systems/Embedded Workbench Evaluation 6.0'
 elif CROSS_TOOL == 'keil':
-    print '================ERROR============================'
-    print 'Not support keil yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support keil yet!')
+    print('=================================================')
     exit(0)	
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/mb9bf568r/rtconfig.py b/bsp/mb9bf568r/rtconfig.py
index 82cf6acf38..abee5014b2 100644
--- a/bsp/mb9bf568r/rtconfig.py
+++ b/bsp/mb9bf568r/rtconfig.py
@@ -16,9 +16,9 @@ elif CROSS_TOOL == 'keil':
     PLATFORM    = 'armcc'
     EXEC_PATH   = 'C:/Keil_MDK_471'
 elif CROSS_TOOL == 'iar':
-    print '================ERROR============================'
-    print 'Not support iar yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support iar yet!')
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/mini2440/rtconfig.py b/bsp/mini2440/rtconfig.py
index bdd11aafef..969cd7fa82 100644
--- a/bsp/mini2440/rtconfig.py
+++ b/bsp/mini2440/rtconfig.py
@@ -21,9 +21,9 @@ elif CROSS_TOOL == 'keil':
     PLATFORM 	= 'armcc'
     EXEC_PATH 	= 'C:/Keil'
 elif CROSS_TOOL == 'iar':
-    print '================ERROR============================'
-    print 'Not support iar yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support iar yet!')
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/mini4020/rtconfig.py b/bsp/mini4020/rtconfig.py
index 9d7b859db8..be8e4535c7 100644
--- a/bsp/mini4020/rtconfig.py
+++ b/bsp/mini4020/rtconfig.py
@@ -10,18 +10,18 @@ CROSS_TOOL 	= 'keil'
 if os.getenv('RTT_CC'):
 	CROSS_TOOL = os.getenv('RTT_CC')
 
-if CROSS_TOOL == 'gcc':
-    print '================ERROR============================'
-    print 'Not support gcc yet!'
-    print '================================================='
+if  CROSS_TOOL == 'gcc':
+    print('================ERROR============================')
+    print('Not support gcc yet!')
+    print('=================================================')
     exit(0)
 elif CROSS_TOOL == 'keil':
 	PLATFORM 	= 'armcc'
 	EXEC_PATH 	= 'c:/Keil'
 elif CROSS_TOOL == 'iar':
-    print '================ERROR============================'
-    print 'Not support iar yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support iar yet!')
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/nrf51822/rtconfig.py b/bsp/nrf51822/rtconfig.py
index 3e9c68fed8..654730708e 100644
--- a/bsp/nrf51822/rtconfig.py
+++ b/bsp/nrf51822/rtconfig.py
@@ -17,9 +17,9 @@ elif CROSS_TOOL == 'keil':
 	PLATFORM 	= 'armcc'
 	EXEC_PATH 	= 'C:/Keil_v5'
 elif CROSS_TOOL == 'iar':
-    print '================ERROR============================'
-    print 'Not support iar yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support iar yet!')
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/nrf52832/rtconfig.py b/bsp/nrf52832/rtconfig.py
index 5e40e7201e..1775b4ab4b 100644
--- a/bsp/nrf52832/rtconfig.py
+++ b/bsp/nrf52832/rtconfig.py
@@ -18,9 +18,9 @@ elif CROSS_TOOL == 'keil':
 	PLATFORM 	= 'armcc'
 	EXEC_PATH 	= 'C:/Keil_v5'
 elif CROSS_TOOL == 'iar':
-    print '================ERROR============================'
-    print 'Not support iar yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support iar yet!')
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/nv32f100x/rtconfig.py b/bsp/nv32f100x/rtconfig.py
index 6927eee3ab..bf568e19b7 100644
--- a/bsp/nv32f100x/rtconfig.py
+++ b/bsp/nv32f100x/rtconfig.py
@@ -14,14 +14,14 @@ if  CROSS_TOOL == 'gcc':
     PLATFORM 	= 'gcc'
     EXEC_PATH 	= 'G:/iot/camera_studio-win32-20160903/camera_studio/tools/arm-2014.05/bin'
 elif CROSS_TOOL == 'keil':
-    print '================ERROR============================'
-    print 'Not support iar yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support iar yet!')
+    print('=================================================')
     exit(0)
 elif CROSS_TOOL == 'iar':
-    print '================ERROR============================'
-    print 'Not support iar yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support iar yet!')
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/realview-a8/SConstruct b/bsp/realview-a8/SConstruct
index 6d57bc4025..67ae413023 100644
--- a/bsp/realview-a8/SConstruct
+++ b/bsp/realview-a8/SConstruct
@@ -29,7 +29,7 @@ if GetDepend('RT_USING_VMM'):
     if os.system('{cppcmd} -P -C -E -I. -D__ASSEMBLY__ {ldfile}.S -o {ldfile}'.format(
                   cppcmd = os.path.join(rtconfig.EXEC_PATH, 'arm-none-eabi-gcc'),
                   ldfile = rtconfig.LINK_SCRIPT)) != 0:
-        print 'failed to generate linker script %s' % rtconfig.LINK_SCRIPT
+        print('failed to generate linker script %s' % rtconfig.LINK_SCRIPT)
         sys.exit(255)
     # if the linker script changed, relink the target
     Depends(TARGET, rtconfig.LINK_SCRIPT)
diff --git a/bsp/rm48x50/rtconfig.py b/bsp/rm48x50/rtconfig.py
index b5e3664dbd..e0899cf38e 100644
--- a/bsp/rm48x50/rtconfig.py
+++ b/bsp/rm48x50/rtconfig.py
@@ -15,9 +15,9 @@ elif CROSS_TOOL == 'keil':
     PLATFORM 	= 'armcc'
     EXEC_PATH 	= 'C:/Keil'
 elif CROSS_TOOL == 'iar':
-    print '================ERROR============================'
-    print 'Not support IAR yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support IAR yet!')
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/sam7x/rtconfig.py b/bsp/sam7x/rtconfig.py
index 565120bfed..761c1b9b6f 100644
--- a/bsp/sam7x/rtconfig.py
+++ b/bsp/sam7x/rtconfig.py
@@ -16,9 +16,9 @@ elif CROSS_TOOL == 'keil':
 	PLATFORM 	= 'armcc'
 	EXEC_PATH 	= 'C:/Keil'
 elif CROSS_TOOL == 'iar':
-    print '================ERROR============================'
-    print 'Not support iar yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support iar yet!')
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/samd21/rtconfig.py b/bsp/samd21/rtconfig.py
index edd1d7358d..9b4743a20c 100644
--- a/bsp/samd21/rtconfig.py
+++ b/bsp/samd21/rtconfig.py
@@ -22,9 +22,9 @@ elif CROSS_TOOL == 'keil':
 	PLATFORM 	= 'armcc'
 	EXEC_PATH 	= 'C:/Keil'
 elif CROSS_TOOL == 'iar':
-    print '================ERROR============================'
-    print 'Not support iar yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support iar yet!')
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/sep6200/rtconfig.py b/bsp/sep6200/rtconfig.py
index 58b05417ad..53384875c9 100644
--- a/bsp/sep6200/rtconfig.py
+++ b/bsp/sep6200/rtconfig.py
@@ -14,9 +14,9 @@ if  CROSS_TOOL == 'gcc':
 	PLATFORM 	= 'gcc'
 	EXEC_PATH 	= '/usr/unicore/gnu-toolchain-unicore/uc4-1.0-beta-hard-RHELAS5/bin/'
 else :
-    print '================ERROR============================'
-    print 'Not support yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support yet!')
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/simulator/SConstruct b/bsp/simulator/SConstruct
index 4283082d04..d433039bba 100755
--- a/bsp/simulator/SConstruct
+++ b/bsp/simulator/SConstruct
@@ -80,7 +80,7 @@ objs = PrepareBuilding(env, RTT_ROOT, has_libcpu=False)
 
 def ObjRemove(objs, remove):
     for item in objs:
-        # print type(item), os.path.basename(str(item))
+        # print(type(item), os.path.basename(str(item)) )
         if os.path.basename(str(item)) in remove:
              objs.remove(item)
     return
diff --git a/bsp/simulator/rtconfig.py b/bsp/simulator/rtconfig.py
index c62b24ea93..915cc3f686 100755
--- a/bsp/simulator/rtconfig.py
+++ b/bsp/simulator/rtconfig.py
@@ -27,7 +27,7 @@ elif  CROSS_TOOL == 'msvc':
     PLATFORM  = 'cl'
     EXEC_PATH = ''
 else:
-    print "bad CROSS TOOL!"
+    print("bad CROSS TOOL!")
     exit(1)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/stm32f0x/rtconfig.py b/bsp/stm32f0x/rtconfig.py
index 790e6215ed..659b664723 100644
--- a/bsp/stm32f0x/rtconfig.py
+++ b/bsp/stm32f0x/rtconfig.py
@@ -17,9 +17,9 @@ elif CROSS_TOOL == 'keil':
 	PLATFORM 	= 'armcc'
 	EXEC_PATH 	= 'C:/Keil'
 elif CROSS_TOOL == 'iar':
-    print '================ERROR============================'
-    print 'Not support iar yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support iar yet!')
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/stm32f40x/SConstruct b/bsp/stm32f40x/SConstruct
index 99c2876aab..ea1e8bf447 100644
--- a/bsp/stm32f40x/SConstruct
+++ b/bsp/stm32f40x/SConstruct
@@ -11,8 +11,8 @@ sys.path = sys.path + [os.path.join(RTT_ROOT, 'tools')]
 try:
     from building import *
 except:
-    print 'Cannot found RT-Thread root directory, please check RTT_ROOT'
-    print RTT_ROOT
+    print('Cannot found RT-Thread root directory, please check RTT_ROOT')
+    print(RTT_ROOT)
     exit(-1)
 
 TARGET = 'rtthread-stm32f4xx.' + rtconfig.TARGET_EXT
diff --git a/bsp/stm32f40x/rtconfig.py b/bsp/stm32f40x/rtconfig.py
index 3438597ee6..1df6020628 100644
--- a/bsp/stm32f40x/rtconfig.py
+++ b/bsp/stm32f40x/rtconfig.py
@@ -17,9 +17,9 @@ elif CROSS_TOOL == 'keil':
     PLATFORM 	= 'armcc'
     EXEC_PATH 	= r'C:/Keil'
 elif CROSS_TOOL == 'iar':
-    print '================ERROR============================'
-    print 'Not support iar yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support iar yet!')
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/stm32f411-nucleo/SConstruct b/bsp/stm32f411-nucleo/SConstruct
index b4d12cc06b..4921ba69bc 100644
--- a/bsp/stm32f411-nucleo/SConstruct
+++ b/bsp/stm32f411-nucleo/SConstruct
@@ -11,8 +11,8 @@ sys.path = sys.path + [os.path.join(RTT_ROOT, 'tools')]
 try:
     from building import *
 except:
-    print 'Cannot found RT-Thread root directory, please check RTT_ROOT'
-    print RTT_ROOT
+    print('Cannot found RT-Thread root directory, please check RTT_ROOT')
+    print(RTT_ROOT)
     exit(-1)
 
 TARGET = 'rtthread-stm32f411.' + rtconfig.TARGET_EXT
diff --git a/bsp/stm32f429-apollo/SConstruct b/bsp/stm32f429-apollo/SConstruct
index ac3196e370..ea6c96c0a8 100644
--- a/bsp/stm32f429-apollo/SConstruct
+++ b/bsp/stm32f429-apollo/SConstruct
@@ -11,8 +11,8 @@ sys.path = sys.path + [os.path.join(RTT_ROOT, 'tools')]
 try:
     from building import *
 except:
-    print 'Cannot found RT-Thread root directory, please check RTT_ROOT'
-    print RTT_ROOT
+    print('Cannot found RT-Thread root directory, please check RTT_ROOT')
+    print(RTT_ROOT)
     exit(-1)
 
 TARGET = 'rtthread-stm32f42x.' + rtconfig.TARGET_EXT
diff --git a/bsp/stm32f429-armfly/SConstruct b/bsp/stm32f429-armfly/SConstruct
index ac3196e370..ea6c96c0a8 100644
--- a/bsp/stm32f429-armfly/SConstruct
+++ b/bsp/stm32f429-armfly/SConstruct
@@ -11,8 +11,8 @@ sys.path = sys.path + [os.path.join(RTT_ROOT, 'tools')]
 try:
     from building import *
 except:
-    print 'Cannot found RT-Thread root directory, please check RTT_ROOT'
-    print RTT_ROOT
+    print('Cannot found RT-Thread root directory, please check RTT_ROOT')
+    print(RTT_ROOT)
     exit(-1)
 
 TARGET = 'rtthread-stm32f42x.' + rtconfig.TARGET_EXT
diff --git a/bsp/stm32f429-armfly/rtconfig.py b/bsp/stm32f429-armfly/rtconfig.py
index 50b58434d9..ece5a363fb 100644
--- a/bsp/stm32f429-armfly/rtconfig.py
+++ b/bsp/stm32f429-armfly/rtconfig.py
@@ -19,9 +19,9 @@ elif CROSS_TOOL == 'keil':
     PLATFORM 	= 'armcc'
     EXEC_PATH 	= r'C:/Keil_v5'
 elif CROSS_TOOL == 'iar':
-    print '================ERROR============================'
-    print 'Not support iar yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support iar yet!')
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/stm32f429-disco/SConstruct b/bsp/stm32f429-disco/SConstruct
index ac3196e370..ea6c96c0a8 100644
--- a/bsp/stm32f429-disco/SConstruct
+++ b/bsp/stm32f429-disco/SConstruct
@@ -11,8 +11,8 @@ sys.path = sys.path + [os.path.join(RTT_ROOT, 'tools')]
 try:
     from building import *
 except:
-    print 'Cannot found RT-Thread root directory, please check RTT_ROOT'
-    print RTT_ROOT
+    print('Cannot found RT-Thread root directory, please check RTT_ROOT')
+    print(RTT_ROOT)
     exit(-1)
 
 TARGET = 'rtthread-stm32f42x.' + rtconfig.TARGET_EXT
diff --git a/bsp/stm32f429-disco/rtconfig.py b/bsp/stm32f429-disco/rtconfig.py
index 312b46052c..40d5f3c805 100644
--- a/bsp/stm32f429-disco/rtconfig.py
+++ b/bsp/stm32f429-disco/rtconfig.py
@@ -17,9 +17,9 @@ elif CROSS_TOOL == 'keil':
     PLATFORM 	= 'armcc'
     EXEC_PATH 	= r'C:/Keil'
 elif CROSS_TOOL == 'iar':
-    print '================ERROR============================'
-    print 'Not support iar yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support iar yet!')
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/stm32f4xx-HAL/SConstruct b/bsp/stm32f4xx-HAL/SConstruct
index 99c2876aab..ea1e8bf447 100644
--- a/bsp/stm32f4xx-HAL/SConstruct
+++ b/bsp/stm32f4xx-HAL/SConstruct
@@ -11,8 +11,8 @@ sys.path = sys.path + [os.path.join(RTT_ROOT, 'tools')]
 try:
     from building import *
 except:
-    print 'Cannot found RT-Thread root directory, please check RTT_ROOT'
-    print RTT_ROOT
+    print('Cannot found RT-Thread root directory, please check RTT_ROOT')
+    print(RTT_ROOT)
     exit(-1)
 
 TARGET = 'rtthread-stm32f4xx.' + rtconfig.TARGET_EXT
diff --git a/bsp/stm32f7-disco/SConstruct b/bsp/stm32f7-disco/SConstruct
index af8f4a90b2..edbf0c62b8 100644
--- a/bsp/stm32f7-disco/SConstruct
+++ b/bsp/stm32f7-disco/SConstruct
@@ -11,8 +11,8 @@ sys.path = sys.path + [os.path.join(RTT_ROOT, 'tools')]
 try:
     from building import *
 except:
-    print 'Cannot found RT-Thread root directory, please check RTT_ROOT'
-    print RTT_ROOT
+    print('Cannot found RT-Thread root directory, please check RTT_ROOT')
+    print(RTT_ROOT)
     exit(-1)
 
 TARGET = 'rtthread-stm32f7xx.' + rtconfig.TARGET_EXT
diff --git a/bsp/stm32h743-nucleo/SConstruct b/bsp/stm32h743-nucleo/SConstruct
index 1e2018c543..dae244260a 100644
--- a/bsp/stm32h743-nucleo/SConstruct
+++ b/bsp/stm32h743-nucleo/SConstruct
@@ -11,8 +11,8 @@ sys.path = sys.path + [os.path.join(RTT_ROOT, 'tools')]
 try:
     from building import *
 except:
-    print 'Cannot found RT-Thread root directory, please check RTT_ROOT'
-    print RTT_ROOT
+    print('Cannot found RT-Thread root directory, please check RTT_ROOT')
+    print(RTT_ROOT)
     exit(-1)
 
 TARGET = 'rtthread-stm32h7xx.' + rtconfig.TARGET_EXT
diff --git a/bsp/stm32l072/rtconfig.py b/bsp/stm32l072/rtconfig.py
index a8f00d12da..8796a79b60 100644
--- a/bsp/stm32l072/rtconfig.py
+++ b/bsp/stm32l072/rtconfig.py
@@ -14,14 +14,14 @@ if  CROSS_TOOL == 'gcc':
     PLATFORM 	= 'gcc'
     EXEC_PATH 	= 'G:/iot/camera_studio-win32-20160903/camera_studio/tools/arm-2014.05/bin'
 elif CROSS_TOOL == 'keil':
-    print '================ERROR============================'
-    print 'Not support iar yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support iar yet!')
+    print('=================================================')
     exit(0)
 elif CROSS_TOOL == 'iar':
-    print '================ERROR============================'
-    print 'Not support iar yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support iar yet!')
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/stm32l475-iot-disco/SConstruct b/bsp/stm32l475-iot-disco/SConstruct
index ac3196e370..ea6c96c0a8 100644
--- a/bsp/stm32l475-iot-disco/SConstruct
+++ b/bsp/stm32l475-iot-disco/SConstruct
@@ -11,8 +11,8 @@ sys.path = sys.path + [os.path.join(RTT_ROOT, 'tools')]
 try:
     from building import *
 except:
-    print 'Cannot found RT-Thread root directory, please check RTT_ROOT'
-    print RTT_ROOT
+    print('Cannot found RT-Thread root directory, please check RTT_ROOT')
+    print(RTT_ROOT)
     exit(-1)
 
 TARGET = 'rtthread-stm32f42x.' + rtconfig.TARGET_EXT
diff --git a/bsp/stm32l475-iot-disco/rtconfig.py b/bsp/stm32l475-iot-disco/rtconfig.py
index 50b58434d9..ece5a363fb 100644
--- a/bsp/stm32l475-iot-disco/rtconfig.py
+++ b/bsp/stm32l475-iot-disco/rtconfig.py
@@ -19,9 +19,9 @@ elif CROSS_TOOL == 'keil':
     PLATFORM 	= 'armcc'
     EXEC_PATH 	= r'C:/Keil_v5'
 elif CROSS_TOOL == 'iar':
-    print '================ERROR============================'
-    print 'Not support iar yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support iar yet!')
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/stm32l476-nucleo/SConstruct b/bsp/stm32l476-nucleo/SConstruct
index 1a32356531..063261ea93 100644
--- a/bsp/stm32l476-nucleo/SConstruct
+++ b/bsp/stm32l476-nucleo/SConstruct
@@ -11,8 +11,8 @@ sys.path = sys.path + [os.path.join(RTT_ROOT, 'tools')]
 try:
     from building import *
 except:
-    print 'Cannot found RT-Thread root directory, please check RTT_ROOT'
-    print RTT_ROOT
+    print('Cannot found RT-Thread root directory, please check RTT_ROOT')
+    print(RTT_ROOT)
     exit(-1)
 
 TARGET = 'rtthread-stm32l476.' + rtconfig.TARGET_EXT
diff --git a/bsp/stm32l476-nucleo/rtconfig.py b/bsp/stm32l476-nucleo/rtconfig.py
index 3b863008b2..43fad6104b 100644
--- a/bsp/stm32l476-nucleo/rtconfig.py
+++ b/bsp/stm32l476-nucleo/rtconfig.py
@@ -19,9 +19,9 @@ elif CROSS_TOOL == 'keil':
     PLATFORM 	= 'armcc'
     EXEC_PATH 	= r'C:/Keil_v5'
 elif CROSS_TOOL == 'iar':
-    print '================ERROR============================'
-    print 'Not support iar yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support iar yet!')
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/tm4c129x/rtconfig.py b/bsp/tm4c129x/rtconfig.py
index d92c9f1101..9b8b95a402 100644
--- a/bsp/tm4c129x/rtconfig.py
+++ b/bsp/tm4c129x/rtconfig.py
@@ -21,9 +21,9 @@ elif CROSS_TOOL == 'keil':
 	PLATFORM 	= 'armcc'
 	EXEC_PATH 	= r'D:\Keil_v5'
 elif CROSS_TOOL == 'iar':
-    print '================ERROR============================'
-    print 'Not support iar yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support iar yet!')
+    print('=================================================')
     exit(0)	
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/upd70f3454/rtconfig.py b/bsp/upd70f3454/rtconfig.py
index ad1565251d..e25c81cfc7 100644
--- a/bsp/upd70f3454/rtconfig.py
+++ b/bsp/upd70f3454/rtconfig.py
@@ -10,17 +10,17 @@ if os.getenv('RTT_CC'):
 	CROSS_TOOL = os.getenv('RTT_CC')
 
 if  CROSS_TOOL == 'gcc':
-    print '================ERROR============================'
-    print 'Not support gcc yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support gcc yet!')
+    print('=================================================')
     exit(0)
 elif CROSS_TOOL == 'iar':
 	PLATFORM 	= 'iar'
 	IAR_PATH = 'C:/Program Files/IAR Systems/Embedded Workbench 6.0 Evaluation_0'
 elif CROSS_TOOL == 'keil':
-    print '================ERROR============================'
-    print 'Not support keil yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support keil yet!')
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/x1000/rtconfig.py b/bsp/x1000/rtconfig.py
index 331639b2e7..b935d7bc4e 100644
--- a/bsp/x1000/rtconfig.py
+++ b/bsp/x1000/rtconfig.py
@@ -12,7 +12,7 @@ if  CROSS_TOOL == 'gcc':
     PLATFORM    = 'gcc'
     EXEC_PATH   = r'E:\work\env\tools\gnu_gcc\mips_gcc\mips-2016.05\bin'
 else:
-    print 'Please make sure your toolchains is GNU GCC!'
+    print('Please make sure your toolchains is GNU GCC!')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/x86/rtconfig.py b/bsp/x86/rtconfig.py
index c602315d06..b833f4de49 100644
--- a/bsp/x86/rtconfig.py
+++ b/bsp/x86/rtconfig.py
@@ -15,14 +15,14 @@ if  CROSS_TOOL == 'gcc':
 	PLATFORM 	= 'gcc'
 	EXEC_PATH 	= 'E:/Program Files/CodeSourcery/Sourcery_CodeBench_Lite_for_IA32_ELF/bin'
 elif CROSS_TOOL == 'keil':
-    print '================ERROR============================'
-    print 'Not support keil yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support keil yet!')
+    print('=================================================')
     exit(0)
 elif CROSS_TOOL == 'iar':
-    print '================ERROR============================'
-    print 'Not support iar yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support iar yet!')
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/bsp/zynq7000/rtconfig.py b/bsp/zynq7000/rtconfig.py
index 45889fb7a5..33e6442073 100644
--- a/bsp/zynq7000/rtconfig.py
+++ b/bsp/zynq7000/rtconfig.py
@@ -15,9 +15,9 @@ elif CROSS_TOOL == 'keil':
     PLATFORM 	= 'armcc'
     EXEC_PATH 	= 'C:/Keil'
 elif CROSS_TOOL == 'iar':
-    print '================ERROR============================'
-    print 'Not support IAR yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support IAR yet!')
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
diff --git a/components/dfs/filesystems/romfs/mkromfs.py b/components/dfs/filesystems/romfs/mkromfs.py
index 9917cf85b9..f3c12876d2 100644
--- a/components/dfs/filesystems/romfs/mkromfs.py
+++ b/components/dfs/filesystems/romfs/mkromfs.py
@@ -50,7 +50,7 @@ class File(object):
         return bytes(self._data)
 
     def dump(self, indent=0):
-        print '%s%s' % (' ' * indent, self._name)
+        print('%s%s' % (' ' * indent, self._name))
 
 class Folder(object):
     bin_fmt = struct.Struct('IIII')
@@ -108,7 +108,7 @@ class Folder(object):
                 c.sort()
 
     def dump(self, indent=0):
-        print '%s%s' % (' ' * indent, self._name)
+        print('%s%s' % (' ' * indent, self._name))
         for c in self._children:
             c.dump(indent + 1)