Adding padding for string types [duplicate]

Question

I have written below code to display a leading zero when the string representation of date has less than two digits?

'{}-{}-{:02d}'.format('6th', 'Jun', '1933')

But it is failing with an error:

ValueError: Unknown format code 'd' for object of type 'str'

There seem to be extra quotes in your example code, which makes for invalid Python. Can you please fix it? — ddejohn
– ddejohn, Commented May 16, 2022 at 18:39
Does this answer your question? How can I fill out a Python string with spaces? Specifically, this answer — pho
– pho, Commented May 16, 2022 at 18:45
I see this answer has been flagged as a duplicate but for your specific case you could try '{:0>4}-{}-{}'.format('6th', 'Jun', '1933') which will add a leading zero if there are less than 4 characters in the day representation. — Stuart Demmer
– Stuart Demmer, Commented May 16, 2022 at 19:29

pho · Accepted Answer · 2022-05-16 18:44:35Z

0

str.format doesn't need format codes in most situations. You could simply use:

'{}-{}-{:02}'.format('6th', 'Jun', '1933')

pho

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answered May 16, 2022 at 18:38

Jasmijn

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2 Comments

this is throwing an error IndexError: Replacement index 1 out of range for positional args tuple

Did you remove the list display?