How to copy a variable string located in a specific location from a text file in python?

Question

I want to copy a string which is located at third place in a text file. Though I can count the character and copy the string based on their character index, I am afraid for some of the files this strings might have more or less number of characters. For example, in the below line I have third string as 239.943; for some other file it could also be 1022.345 or 98.234.

       1  51 239.943   .2081   .0137   .2016   .0017

Is there any way to identify and copy the third string i.e., 239.943 irrespective of its character length in python?

I'm sorry, but there is no such thing to post. I am reading a text file, which has these numbers at second line. I am reading the line and want to copy second string. Likewise I will be copying second string iteratively for multiple files. — dsbisht, May 19 '18 at 09:05

score 1 · Answer 1 · edited May 19 '18 at 09:26

1

Read line by line, split by spaces and read array[2] from the obtained array.

with open(filepath) as fp:  
    line = fp.readline()
    while line:
        arr = re.split(r'\s+', line)  
        print arr[2]
        line = fp.readline()

edited May 19 '18 at 09:26

Georgy

12,464
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answered May 19 '18 at 09:04

Hemanth Gowda

604
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score 0 · Answer 2 · answered May 19 '18 at 09:07

0

maybe your question is related to https://stackoverflow.com/a/2294502/7244300.

>>> s = "I have a cat"
>>> s.find("have")
2

answered May 19 '18 at 09:07

lelouchkako

123
1
7

Surely not the problem. – Hemanth Gowda May 19 '18 at 10:06

How to copy a variable string located in a specific location from a text file in python?

2 Answers2