Python Tutorial ( PDFDrive )

Parameters
• NA
Return Value
This method returns the current position of the file read/write pointer within the file.
Example
The following example shows the usage of tell() method.
#!/usr/bin/python
# Open a file
fo = open("foo.txt", "r")
print "Name of the file: ", fo.name
# Assuming file has following 5 lines
# This is 1st line
# This is 2nd line
# This is 3rd line
# This is 4th line
# This is 5th line
line = fo.readline()
print "Read Line: %s" % (line)
# Get the current position of the file.
pos = fo.tell()
print "Current Position: %d" % (pos)
# Close opened file
fo.close()
Let us compile and run the above program, this will produce the following result:
Name of the file: foo.txt
Read Line: This is 1st line
Current Position: 17
file.truncate([size])
Description
The method truncate() truncates the file's size. If the optional size argument is present, the file is truncated to (at
most) that size..
The size defaults to the current position. The current file position is not changed. Note that if a specified
size exceeds the file's current size, the result is platform-dependent.
Note: This method would not work in case file is opened in read-only mode.
Syntax
Following is the syntax for truncate() method:
fileObject.truncate( [ size ])
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