如何检查变量是否为0.0而不是False？

variable = 0.0
if type(variable) == float and variable != 0.0:
    print("变量不是0.0")
else:
    print("变量是0.0")

variable = 0.0
if variable != 0.0:
    print("变量不是0.0")
else:
    print("变量是0.0")

import math

variable = 0.0
if math.isclose(variable, 0.0, rel_tol=1e-9):
    print("变量是0.0")
else:
    print("变量不是0.0")