Is there any difference between the infinities returned by the math module and cmath module?
Does the complex infinity have an imaginary component of 0?
Is there a difference between math.inf and cmath.inf in Python?
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Any difference?
No, there is no difference. According to the docs, both
math.infandcmath.infare equivalent tofloat('inf'), or floating-point infinity.If you want a truly complex infinity that has a real component of infinity and an imaginary component of 0, you have to build it yourself:
complex(math.inf, 0)There is, however,
cmath.infj, if you want 0 as a real value and infinity as the imaginary component.Constructing imaginary infinity
As others have pointed out
math.inf + 0jis a bit faster thancomplex(math.inf, 0). We're talking on the order of nanoseconds though.