Why Python format function is not working?

Question

In python I wrote:

list_of_assets = []
list_of_assets.append(('A', 'B', 'C'))
for asset in list_of_assets:
    print('{:15}   {:30}   {:30}'.format([asset[0], asset[1], asset[2]]))

But I get:

print('{:15}   {:30}   {:30}'.format([asset[0], asset[1], asset[2]]))
TypeError: non-empty format string passed to object.__format__

why is that?

mozway · Accepted Answer · 2022-01-04 18:01:32Z

2

Don't wrap the format parameters in a list:

list_of_assets = []
list_of_assets.append(('A', 'B', 'C'))
for asset in list_of_assets:
    #                              here  ↓                  and here ↓
    print('{:15}   {:30}   {:30}'.format(asset[0], asset[1], asset[2]))

output:

A                 B                                C

Even better, you could use parameter expansion:

for asset in list_of_assets:
    print('{:15}   {:30}   {:30}'.format(*asset))

edited Jan 4, 2022 at 18:01

answered Jan 4, 2022 at 17:43

mozway

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Comments

Babatunde Mustapha · Accepted Answer · 2022-01-04 17:51:44Z

0

The error came because you passed a list argument to the format function. Pass individual elements of the list instead.

Your code should be like this:

list_of_assets = []
list_of_assets.append(('A', 'B', 'C'))
for asset in list_of_assets:
    print('{:15}   {:30}   {:30}'.format(asset[0], asset[1], asset[2]))

answered Jan 4, 2022 at 17:51

Babatunde Mustapha

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Comments

luk2302 · Accepted Answer · 2022-11-25 17:04:36Z

0

Use this code

list_of_assets = []
list_of_assets.append(('A', 'B', 'C'))
for asset in list_of_assets:
    print('{:15}   {:30}   {:30}'.format(asset[0],asset[1],asset[2]))

edited Nov 25, 2022 at 17:04

luk2302

57.5k24 gold badges109 silver badges152 bronze badges

answered Nov 25, 2022 at 16:11

Venkydeexu18

1

1 Comment

AlexK Over a year ago

Please don't post only code as answer, but also provide an explanation what your code does and how it solves the problem of the question. Answers with an explanation are usually more helpful and of better quality, and are more likely to attract upvotes.

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