只退还第一件物品

Question

In my function below I'm trying to return the full text from multiple .txt files and append the results to a list, however, my function only returns the text from the first file in my directory. That said if I replace return with print it logs all the results to the console on its own line but I can't seem to append the results to a list. What am I doing wrong with the return function. Thanks.

import glob
import copy

file_paths = []
file_paths.extend(glob.glob("C:\Users\7812397\PycharmProjects\Sequence      diagrams\*"))
matching_txt = [s for s in file_paths if ".txt" in s]
full_text = []
def fulltext():
    for file in matching_txt:
        f = open(file, "r")
        ftext = f.read()
        all_seqs = ftext.split("title ")
        return all_seqs
print fulltext()

Answer 1

You're putting return inside your loop. I think you want to do. Although, you could yield the values here.

for file in matching_txt:
    f = open(file, "r")
    ....
    full_text.append(all_seqs)
return full_text 

Answer 2

You can convert your function to a generator which is more efficient in terms of memory use:

def fulltext():
    for file_name in matching_txt:
        with open(file_name) as f:
            ftext = f.read()
            all_seqs = ftext.split("title ")
            yield all_seqs

Then convert the generator to a list if they are not huge, other wise you can simply loop over the result if you want to use the generator's items:

full_text = list(fulltext())

Some issues in your function:

First off, don't use python built-in names as variable names (in this case file). Secondly for dealing with files (and other internal connections) you better to use with statement which will close the file at the end of the block automatically.