Help combining files

Hello,

I am trying to take all the files in my folder proteinsequences and combine them all into one file. I have been on the nternet trying to find other peoples programs. This one seems like it should work but I get a syntax error. The arrow points to the =. in "print(l, file = out)" Any suggestions?

#set to the file extension of "to-be-merged" files
ext='._ALL'
#set to your working directory
dir_path='/home/bonita/Documents/proteinsequences'
#set to the name of your output file
results='NB_protein.fasta'

import os
files=os.listdir(dir_path)
for f in files:
if f.endswith(ext):
data = open(f)
out = open(results, 'w')
for l in data:
print(l, file = out)
data.close()
out.close()

Sure,
the code you posted is a python3 code. It won't work in python2.

Hmm, it has recently been shown to me that you might be able to import print_function from the future.

from __future__ import print_function


But why are you writing a program?

in unix, and it looks like you've got a unixy system, the command is:

$ cat *._ALL > NB_protein.fasta

I'm not going to bother checking what the DOS command is, but it's probably

A:> copy *._ALL NB_protein.fasta
[insert new floppy for A:]

b49P23TIvg is right, no point writing a program that is already done by dos or terminal

but to answer your question your problem is you print(l, file = out), this doesn't work this way at least not to my knowledge use something like the following


That should be good enough to give you an idea of what you need to do. hope this has helped good luck with python

Thank you for the help guys.

You were right I just used the cat *>file command in the terminal. The only reason I was trying to code it is because I didn't know it was so easily done.


Thank you again for the help!

no problem