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Bookmark or Share- String formatting: % vs. .format vs. f-string literalThis can be useful when you have two regexes, where one is used alone without format, but the concatenation of both is formatted. Or just use '{type_names} [a-z]{{2}}'.format(type_names='triangle|square'). It's like saying .format() can help when using strings which already contain a percent character. Sure.
- What is the difference between %f and %lf in C? - Stack OverflowFor printf, arguments of type float are promoted to double so both %f and %lf are used for double. For scanf, you should use %f for float and %lf for double. More detail for the language lawyers among us below: There is no difference between %f and %lf in the printf family. The ISO C standard (all references within are from C11), section 7.21.6 ...
- Fixed digits after decimal with f-strings - Stack OverflowWorth noting that f-strings can be parametrized with double braces. The inner brace is evaluated (firstly) as an expression and it's result (RHS) value is (secondly) inserted into the f-string functionality (as noted in the docs). i.e. to specify the decimal places as: for i in range(3): print(f'{1.002:,.{i}f}') > 1 > 1.0 > 1.00 and
- python - String concatenation with + vs. f-string - Stack OverflowFor two strings of length 100000, concatenation is 1.21585 times faster than f-strings. For two strings of length 1000000, concatenation is 1.01816 times faster than f-strings. And the plot: Summary: Using the string concatenation operator is slightly faster than using format string literals.
- python - What is print(f"...") - Stack OverflowThe f or F in front of strings tell Python to look at the values , expressions or instance inside {} and substitute them with the variables values or results if exists. The best thing about f-formatting is that you can do cool stuff in {}, e.g. {kill_count * 100}. You can use it to debug using print e.g.
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