Python file string comparison

Question

I am trying to do a string comparison between strings in two text files. The text is produced by bintext application reading from .exe and produce files with format such as below :

File pos Mem pos ID Text

======== ======= == ====

00000000004D 00000040004D 0 !This program cannot be run in DOS mode.

0000000000A0 0000004000A0 0 Rich!

I tried to do a line.split with a white space, but as a result the last column content is also separated with white space. Instead of [!this program cannot be run in dos mode] I got [!this,program,cannot,be,run,in,DOS,Mode,.]

Is there any simple way to put in the array the entire column 3 from the txt file without splitting it ?

i didnt, i put the count and play around with the parameter and it got the result i wanted. thanks ! — razler
– razler, Commented Aug 7, 2014 at 22:21

shaktimaan · Accepted Answer · 2014-08-07 21:30:11Z

2

How about this:

data = []
for line in input_file:
    data.append(line.strip().split(' ', 3))

This will give you:

['00000000004D', '00000040004D', '0', '!This program cannot be run in DOS mode.']
['0000000000A0', '0000004000A0', '0', 'Rich!']

Documentation on split() function

answered Aug 7, 2014 at 21:30

shaktimaan

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razler Over a year ago

i used this advice and increased the split count since the file is not exactly separated by one space per column. i tried to post the actual formatting initially but it reads only one space :\ issue resolved.

Roland Smith · Accepted Answer · 2014-08-07 21:27:56Z

1

If the first part of the string has a constant length, using slicing;

In [1]: s = '00000000004D 00000040004D 0 !This program cannot be run in DOS mode.'

In [2]: s[28:]
Out[2]: '!This program cannot be run in DOS mode.'

answered Aug 7, 2014 at 21:27

Roland Smith

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Comments

enrico.bacis · Accepted Answer · 2014-08-07 21:38:07Z

1

As you can see in Python docs, the str.split method has an optional maxsplit argument which, if gives, specifies that a maximum number of splits that can be performed on the list.

Assuming that you already know how to read the file you can specify a maximum of 3 splits:

data = "00000000004D 00000040004D 0 !This program cannot be run in DOS mode."
data.split(None, 3)

edited Aug 7, 2014 at 21:38

answered Aug 7, 2014 at 21:27

enrico.bacis

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Padraic Cunningham · Accepted Answer · 2014-08-07 21:36:10Z

0

In [93]: s = "00000000004D 00000040004D 0 !This program cannot be run in DOS mode."

In [94]: s.rsplit("0",1)[-1] # rsplit once on the 0
Out[94]: ' !This program cannot be run in DOS mode.'

      import re
[96]: re.split("\d\s",s)[-1] # single digit followed by a space
Out[96]: '!This program cannot be run in DOS mode.'

answered Aug 7, 2014 at 21:36

Padraic Cunningham

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