Python file for loop

Question

I am new to python so excuse my stupidity. I am trying to iterate over a dictionary that is in a file (.txt). However, I only want to iterate over the keys from the dictionary, not the values. I have been trying for hours but have made no progress. Thanks for the help.

kluizen = {
    11;kaasstengel,
    1;geheim,
    5;kluisvanpietje,
    12;z@terd@g
 } #the number of a locker with the password afterwards.

f = open('fa_kluizen.txt', 'r') 
contents = f.read() 
print(contents) 

for numbers in contents: print(numbers) 
f.close()

for key in dictionary: If you iterate over a dictionary, you get the keys. — Barmar
– Barmar, Commented Oct 4, 2020 at 10:19
Edit your post when adding more info, not in comment and explain what is what — azro
– azro, Commented Oct 4, 2020 at 10:23
You should use colons in you dictionary not semi-colons. Does the text file you're importing have semi-colons? — Uchiha Madara
– Uchiha Madara, Commented Oct 4, 2020 at 10:59

Gabio · Accepted Answer · 2020-10-04 10:21:09Z

1

Try this:

import json

with open("path/to/file.txt", "r") as f:
    # read the file as dictionary
    file_as_dict = json.load(f) 

    # iterate over the keys
    for key in file_as_dict:
        print(key)

answered Oct 4, 2020 at 10:21

Gabio

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Comments

Hocli · Accepted Answer · 2020-10-04 11:11:54Z

0

That file does not contain a dictionary, as you cannot store literally a Python dictionary in a file.

But I agree with you it looks like a dictionary in the sense that it has information organized in key value pairs.

You're interested in getting the keys out of there: that is the number of the locker.

mykeys = []

with open('fa_kluizen.txt', 'r') as fp:
    for line in fp:
        if ';' in line:
            key, value = line.strip().split(';')

            mykeys.append(key)


# now we have it in mykeys list

for key in mykeys:
    print(key)

Please try this:

answered Oct 4, 2020 at 11:11

Hocli

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