使用python将文件中的字符串导入列表

Question

I have a txt file, with these contents:

a,b
c,d
e,f
g,h
i,j
k,l

And i am putting them into a list, using these lines:

keywords=[]
solutions=[]
for i in file:
    keywords.append((i.split(","))[0])
    solutions.append(((i.split(","))[1]))

but when I print() the solutions, here is what it displays:

['b\n', 'd\n', 'f\n', 'h\n', 'j\n', 'l']

How do I make it, so that the \\ns are removed from the ends of the first 5 elements, bu the last element is left unaltered, using as few lines as possible.

Answer 1

You can use str.strip() in order to trimming the last whitespace. But as a more pythonic approach you better to use csv module for loading your file content which will accept a delimiter and return an iterable contain tuples of separated items (here, the characters). The use zip() function to get the columns.

import csv
with open(file_name) as f:
    reader_obj = csv.reader(f, delimiter=',') # here passing the delimiter is optional because by default it will consider comma as delimiter.
    first_column, second_column = zip(*reader_obj)

Answer 2

You need to string.strip() the whitespace/new-line characters from the string after reading it to remove the \\n :

keywords=[]
solutions=[]
for i_raw in file:
    i = i_raw.strip() # <-- removes extraneous spaces from start/end of string 
    keywords.append((i.split(","))[0])
    solutions.append(((i.split(","))[1]))