complex¶
Description¶
Returns an expression converted into a complex number.
Syntax¶
complex ([real[, imaginary]])
- real
- Optional. Must be a number.
- imaginary
- Optional. Must be a number.
complex ([string])
- string
- Optional. If string is used it must represent a valid Python numeric type.
Return Value¶
complex
Time Complexity¶
#TODO
Note¶
When converting from a string, the string must not contain whitespace around the central + or - operator. For example, complex(‘1+2j’) is fine, but complex(‘1 + 2j’) raises ValueError. The complex type is described in Numeric Types — int, float, long, complex.
Remarks¶
If the first parameter is a string, it will be interpreted as a complex number and the function must be called without a second parameter. The second parameter can never be a string. Each argument may be any numeric type (including complex). If imaginary is omitted, it defaults to zero and the function serves as a numeric conversion function like int(), long() and float(). If both arguments are omitted, returns 0j.
Example 1¶
>>> complex()
0j
>>> complex(1)
(1+0j)
>>> complex(1, 2)
(1+2j)
Example 2¶
>>> complex(1.12, 2.34)
(1.12+2.34j)
>>> complex(1, 2.34)
(1+2.34j)
>>> complex(1+2j)
(1+2j)
>>> complex(1+2j, 3+4j)
(-3+5j)
Example 2¶
>>> complex('1')
(1+0j)
>>> complex('1+5j')
(1+5j)
See Also¶
#TODO