为什么if条件会打印非零条件的零值？

value = 0
if value:  # 这里 value 被解释为布尔值 False
    print("Value is non-zero")
else:
    print("Value is zero")  # 输出: Value is zero

value = 10
if some_condition:
    value = 0  # 意外将 value 设为零
if value:
    print("Value is non-zero")
else:
    print("Value is zero")  # 输出: Value is zero

value = 1e-16
if abs(value) > 1e-15:  # 使用容差判断
    print("Value is non-zero")
else:
    print("Value is effectively zero")  # 输出: Value is effectively zero

value = 10
if complex_condition:
    value = some_function()
if value:
    print("Value is non-zero")
else:
    print("Value is zero")  # 可能由于 some_function() 返回了零