函數可調用的,類是不可調用的,若想類被調用,則需要添加 __call__()
函數:
舉例:
class Student:
def __init__(self, name, id):
self.name = name
self.id = id
def __call__(self):
print("Student %s is created." %self.name)
print("His ID is:", self.id)
a = Student('ZhangSan', 1)
a()
輸出爲:
Student ZhangSan is created.
His ID is: 1
當然 __call__()
函數也可以有參數, 舉例:
class Student:
def __init__(self, name, id):
self.name = name
self.id = id
def __call__(self, grade):
print("Student %s is created." %self.name)
print("His ID is:", self.id)
self.grade = grade
if (grade>=90):
print("%s's grade is great." %self.name)
else:
return;
a = Student('ZhangSan', 1)
a(94)
print("")
b =Student('LiSi', 2)
b(58)
輸出爲:
Student ZhangSan is created.
His ID is: 1
ZhangSan's grade is great.
Student LiSi is created.
His ID is: 2