Python os.ftruncate() 方法 python os.fsync() 方法 Python os.getcwd() 方法 Python os.ftruncate() 方法 #!/usr/bin/python import os, sys # Open a file fd = os.open( "foo.txt", os.O_RDWR|os.O_CREAT ) # Write one string os.write(fd, "This is test - This is test") # Now you can use ftruncate() 方法. os.ftruncate(fd, 10) # Now read this file from the beginning. os.lseek(fd, 0, 0) str = os.read(fd, 100) print "Read String is : ", str # Close opened file os.close( fd ) print "Closed the file successfully!!" python os.fsync() 方法 Python os.getcwd() 方法