arranging files in a text file

Question

i have many .txt files in a directory named as (TU_1.ST01.XXX.TXT_,TU_1.ST02.XXX.TXT_, TU_1.ST03.XXX.TXT_, .......TU_1.ST1000.XXX.TXT_). i want to arrange all the text files side by side and want to save it in a file which should be equal to the paste command in shell scripting.

Can anybody help me doing this.

I tried the script

import numpy as np
import os
import glob

for file in glob.glob("*.TXT_"):
    print(file)
    #here i want to arrange files 

Answer 1

Example input files:

$ paste *.txt
one    four    six
two    five    seven
thee           eight   
               nine

Using pandas is one option.

import pandas  as pd
from   pathlib import Path

>>> pd.DataFrame(f.read_text().splitlines() for f in Path().glob('*.txt'))
      0      1      2     3
0   one    two   thee  None
1  four   five   None  None
2   six  seven  eight  nine

You can then .tranpose() / .T to turn each file into its own column.

>>> df = pd.DataFrame(f.read_text().splitlines() for f in Path().glob('*.txt'))
>>> df.T
      0     1      2
0   one  four    six
1   two  five  seven
2  thee  None  eight
3  None  None   nine

You can then use .to_csv() and set the sep if you want to emulate the tabbed output from paste

>>> print(df.T.to_csv(index=None, header=None, sep='\t'), end='')
one    four    six
two    five    seven
thee           eight   
               nine

You could also implement it using itertools.zip_longest