Reading files of same typolgy in a folder

Question

I need a little help to finish my program. I have in a folder 20 files of the same typology, strings with corresponding values. Is there a way to create a function that opens all the files in this way
file1 = [line.strip() for line in open("/Python34/elez/file1.txt", "r")]?

I hope I explained it well. Thanks!

I need to read every files and write in a new file a summary of them — Gulliver, Dec 19 '14 at 00:49

Peter Wood · Answer 1 · 2014-12-19T00:42:14.047

1

from os import listdir
from os.path import join, isfile

def contents(filepath):
    with open(filepath) as f:
        return f.read()

directory = '/Python34/elez'

all_file_contents = [contents(join(directory, filename))
                     for filename in listdir(directory)
                     if isfile(join(directory, filename)]

edited Dec 19 '14 at 00:42

answered Dec 18 '14 at 23:57

Peter Wood

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I think itertools.chain or a generator would be better – Padraic Cunningham Dec 19 '14 at 00:09
I always get this error `PermissionError: [Errno 13] Permission denied: '/Python34/elez'` – Gulliver Dec 19 '14 at 00:33
@Gulliver You probably have a directory as well as a file. `open(directory)` for example will give you that error. You need to filter them out using `glob` or `os.path.isfile`. – Peter Wood Dec 19 '14 at 00:40

score 0 · Answer 2 · edited May 23 '17 at 11:57

Hi Gulliver this is how i will do it:

import os 

all_files = [] ## create a list to keep all the lines for all files 


for file in os.listdir('./'):  ## use list dir to list all files in the dir 
    with open(file, 'r') as f: ## use with to open file 
        fields = [line.strip() for line in f] ## list comprehension to finish reading the field 
        all_fields.extend(fields) ## store in big list

For more information about using the with statement to open and read files, please refer to this answer Correct way to write to files?

Reading files of same typolgy in a folder

2 Answers2