Python with, statements

1. Manipulating file objects with the WITH statement

With open (R ' Somefilename ') as Somefile: For line in        somefile:            print line            # ... more code

The WITH statement is used here to ensure that the open file handle has been closed after execution of the WITH statement, regardless of whether an exception occurred during the processing of the file. If you use the traditional try/finally paradigm, use code similar to the following:

2, try/finally mode operation file Object

Somefile = open (R ' somefilename ')    try: For line in        somefile:            print line            # ... more code    finally:        Somefile.close ()

Python with, statements