Python method ftruncate() truncates the file corresponding to file descriptor fd, so that it is at most length bytes in size.
Following is the syntax for ftruncate() method −
This method does not return any value.
The following example shows the usage of ftruncate() method.
#!/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() method. 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!!"
When we run the above program, it produces the following result:
Read String is : This is te Closed the file successfully!!
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