{"id":122231,"date":"2020-12-18T18:10:56","date_gmt":"2020-12-18T18:10:56","guid":{"rendered":"https:\/\/blog.finxter.com\/?p=18809"},"modified":"2020-12-18T18:10:56","modified_gmt":"2020-12-18T18:10:56","slug":"python-complex-a-useless-python-feature","status":"publish","type":"post","link":"https:\/\/sickgaming.net\/blog\/2020\/12\/18\/python-complex-a-useless-python-feature\/","title":{"rendered":"Python complex() \u2014 A Useless Python Feature?"},"content":{"rendered":"

The Python complex()<\/code> method returns a complex number object. You can either pass a string argument to convert the string to a complex number, or you provide the real and imaginary parts to create a new complex number from those.<\/p>\n

This article shows you how to use Python’s built-in complex()<\/code> constructor. You’ll not only learn how to use it—but also why it is useless<\/em><\/strong> and what you should do instead in newer Python versions. <\/p>\n

Usage<\/h2>\n

Learn by example! Here are some examples of how to use the complex()<\/code> built-in function<\/a>:<\/p>\n

>>> complex(1, -2)\n(1-2j)\n>>> complex(2, -1)\n(2-1j)\n>>> complex(2, 2)\n(2+2j)\n>>> complex(1)\n(1+0j)\n>>> complex(2)\n(2+0j)\n>>> complex('42-21j')\n(42-21j)<\/pre>\n<\/p>\n
Syntax Complex()<\/h2>\n
You can use the complex()<\/code> method with three different argument lists. <\/p>\n
Syntax: <\/strong>\ncomplex(real)<\/strong> # Imaginary Part is 0j<\/code>\ncomplex(real, img)<\/strong> # Both real and imaginary part are given<\/code>\ncomplex(string) <\/strong> # String has format 'x+yj' for real part x and imaginary part y. <\/code><\/pre>\n
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Arguments<\/strong><\/td>\nreal<\/code><\/td>\nThe real part of the complex number<\/td>\n<\/tr>\n
<\/td>\nimg<\/code><\/td>\nThe imaginary part of the complex number<\/td>\n<\/tr>\n
<\/td>\nstring<\/code><\/td>\nA string defining the real and imaginary part in the form 'x+yj'<\/code> or 'x+yJ'<\/code> where x<\/code> and y<\/code> are integers for the real and imaginary parts.<\/td>\n<\/tr>\n
Return Value<\/strong><\/td>\ncomplex<\/code><\/td>\nReturns a complex number.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n
Video Complex()<\/h2>\n
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