Python有一组内置方法，__call__是其中之一。的__call__ 方法使Python程序员可以编写类，在这些类中，实例的行为类似于函数，可以像函数一样调用。当实例作为函数调用时；如果定义了此方法，x(arg1, arg2, ...)是的简写x.__call__(arg1, arg2, ...)。
object() is shorthand for object.__call__()
范例1：
class Example:
def __init__(self):
print("Instance Created")
# Defining __call__ method
def __call__(self):
print("Instance is called via special method")
# Instance created
e = Example()
# __call__ method will be called
e()输出：
Instance Created Instance is called via special method
范例2：
class Product:
def __init__(self):
print("Instance Created")
# Defining __call__ method
def __call__(self, a, b):
print(a * b)
# Instance created
ans = Product()
# __call__ method will be called
ans(10, 20)输出：
Instance Created 200
注：本文由纯净天空筛选整理自rakshitarora大神的英文原创作品 __call__ in Python。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。