"""Stub file for the 'cmath' module."""

import sys
from typing import Union, Tuple

e = ...  # type: float
pi = ...  # type: float

_C = Union[float, complex]

def acos(x: _C) -> complex: ...
def acosh(x: _C) -> complex: ...
def asin(x: _C) -> complex: ...
def asinh(x: _C) -> complex: ...
def atan(x: _C) -> complex: ...
def atanh(x: _C) -> complex: ...
def cos(x: _C) -> complex: ...
def cosh(x: _C) -> complex: ...
def exp(x: _C) -> complex: ...
def isinf(z: _C) -> bool: ...
def isnan(z: _C) -> bool: ...
def log(x: _C, base: _C = ...) -> complex: ...
def log10(x: _C) -> complex: ...
def phase(z: _C) -> float: ...
def polar(z: _C) -> Tuple[float, float]: ...
def rect(r: float, phi: float) -> complex: ...
def sin(x: _C) -> complex: ...
def sinh(x: _C) -> complex: ...
def sqrt(x: _C) -> complex: ...
def tan(x: _C) -> complex: ...
def tanh(x: _C) -> complex: ...

if sys.version_info >= (3,):
    def isfinite(z: _C) -> bool: ...