In case you didn't know: Python 3.8 f-strings support = for self-documenting expressions and debugging
Python 3.8 added an = specifier to f-strings. An f-string such as f'{expr=}' will expand to the text of the expression, an equal sign, then the representation of the evaluated expression.
Examples:
input:
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from datetime import date
user = 'eric_idle'
member_since = date(1975, 7, 31)
f'{user=} {member_since=}'
output:
"user='eric_idle' member_since=datetime.date(1975, 7, 31)"
input:
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delta = date.today() - member_since
f'{user=!s} {delta.days=:,d}'
output (no quotes; commas):
'user=eric_idle delta.days=16,075'
input:
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from math import cos,radians
theta=30
print(f'{theta=} {cos(radians(theta))=:.3f}')
output:
theta=30 cos(radians(theta))=0.866