Changing a line in a text file

[Vishnu]

Hi,
Here is the program for replacing 'line2' with 'newline'.

inp_file.txt contains,

line1
line2
line3
line4
EOF

#-- Program starts
#Get the inp file in to a list
inp_file_list = [x for x in open('inp_file.txt')]

#modify the desired line, Note: you should include newline
inp_file_list[1] = 'xxx\n'

#Open the same file
write_to_file = open('inp_file.txt', 'w')

#write the list in to the file
write_to_file.writelines(inp_file_list)

#close the file
write_to_file.close()

#-- Program ends

Hope someone will give better idea.
HTH,
Vishnu

-----Original Message-----
From: python-list-bounces+vishnu=acmet.com at python.org
[mailto:python-list-bounces+vishnu=acmet.com at python.org] On Behalf Of
kah
Sent: Monday, April 25, 2005 3:09 PM
To: python-list at python.org
Subject: Changing a line in a text file

How do I change a line in a file??

For example I have the follwing text in my file:

line1
line2
line3
line4

How do I replace 'line2' with 'newline'. Since the write operation in
python will  overwrite everything.

Regards,
Kah

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