make a list using format() in python

Question

I am new to python and coding in general. Therefore I apologize if this has been talked about already and I am just unable to find it.

I am trying to get a list of stringnames.

for x in list:
    foldername = 'bla/exp-{number}/exp-{number}-A/bls'.format(number = x)

my_list.append(glob("/bla/bla/bla/" + foldername))
len(my_list)

len(my_list) returns just 2, even though x = 100

I am not really sure how to proceed.

Thanks in advance.

my_list.append is not inside the loop. Python uses indentation as syntax. — Niels Abildgaard
– Niels Abildgaard, Commented Jan 16, 2015 at 15:23

dubbe · Accepted Answer · 2015-01-16 15:20:47Z

3

my_list.append(glob("/bla/bla/bla/" + foldername)) is called outside of the loop. So it will only append the last foldername.

Python is not my goto-language but

for x in list:
    foldername = 'bla/exp-{number}/exp-{number}-A/bls'.format(number = x)
    my_list.append(glob("/bla/bla/bla/" + foldername))

len(my_list)

Should give a diffrent result.

answered Jan 16, 2015 at 15:20

dubbe

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Comments

fredtantini · Accepted Answer · 2015-01-16 15:20:49Z

2

You have to indent the line where you append to mylist:

for x in list:
    foldername = 'bla/exp-{number}/exp-{number}-A/bls'.format(number = x)
    my_list.append(glob("/bla/bla/bla/" + foldername))

len(my_list)

answered Jan 16, 2015 at 15:20

fredtantini

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4 Comments

dubbe Over a year ago

This will append the last foldername twice since it's still called outside of the loop as well. (Code rewritten now and no problem with it)

fredtantini Over a year ago

@dubbe yep, bad copy/paste :þ

Annamarie Over a year ago

Thankyou - by the way- why does this comment have to be longer than a certain amount of characters? I cannot just say 'thanks'. It is too short...

dubbe Over a year ago

The idea is that you should upvote instead of saying just thanks.

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