[3.12] gh-109218: Improve documentation for the complex() constructor (GH-119687) by serhiy-storchaka · Pull Request #119805 · python/cpython (original) (raw)

…ructor (pythonGH-119687)

• Remove the equivalence with real+imag*1j which can be incorrect in corner cases (non-finite numbers, the sign of zeroes).
• Separately document the three roles of the constructor: parsing a string, converting a number, and constructing a complex from components.
• Document positional-only parameters of complex(), float(), int() and bool() as positional-only.
• Add examples for complex() and int().
• Specify the grammar of the string for complex().
• Improve the grammar of the string for float().
• Describe more explicitly the behavior when real and/or imag arguments are complex numbers. (This will be deprecated in future.) (cherry picked from commit ec1ba26)

Co-authored-by: Serhiy Storchaka storchaka@gmail.com