Mark Dickinson added the comment: With the string, the minus sign applies only to the imaginary part; with the expression '-1j', it applies to the whole complex number (both real and imaginary parts).
I don't see any sensible way to 'fix' the string to complex conversion; indeed, I think any change would make it worse than before. It's a known issue with complex arithmetic that x + 1j*y doesn't give you complex(x, y); the conversions from string and the complex(x, y) form are there to make it possible to carefully create a complex number with known real and imaginary parts. > For example, in pypy we use the same code for parsing literals and > converting strings, so you get -0.0 in both cases. But -1j isn't a literal. It's unary minus applied to a the complex number given by the literal '1j'. Python's code *does* give the same results both for converting strings and parsing literals. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue9011> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
