Python tip 3: expression and result with f-string

In case you haven't yet discovered this awesome f-string feature, you can add = after an expression to get both the expression and the result in the output.

>>> num1 = 42
>>> num2 = 7

>>> f'{num1 + num2 = }'
'num1 + num2 = 49'
>>> f'{num1 + (num2 * 10) = }'
'num1 + (num2 * 10) = 112'

I use it often to quickly test a function:

>>> def isodd(n):
...     return bool(n % 2)
... 
>>> print(f'{isodd(42) = }')
isodd(42) = False
>>> print(f'{isodd(123) = }')
isodd(123) = True

See docs.python: Format String Syntax, docs.python: Formatted string literals and fstring.help for documentation and examples.

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