datetime with string.Template-CodePudding

Inside a template passed to string.Template I want to apply a custom format for a datetime object.

The following code does NOT work, but I would like to end up with something like this:

from datetime import datetime as dt
import string

print('{:%a, %d.%m.%Y at %H:%M}'.format(dt.now()))
print(string.Template("${dt:%a, %d.%m.%Y at %H:%M}").substitute({"d": dt.now()}))

The first line will work without any error, but the second will fail with ValueError: Invalid placeholder in string: line 1, col 1

CodePudding user response：

>>> print(string.Template("{$d:%a, %d.%m.%Y at %H:%M}").substitute({"d": dt.now()}))

{2022-04-19 10:51:57.409244:%a, %d.%m.%Y at %H:%M}

i got past the invalid placeholder error by moving $ to d. but the formatting is not as expected