Python3问题TypeError: object() takes no parameters

    

    时间是一切财富中最宝贵的财富。--------德奥弗拉斯多

    Python中关键字变量和特殊函数，都是以__xxx__来表示的，初学Python的朋友，需要注意其中变量名中前后是有两个下划线（_）的，如果不注意，调用内部关键字变量和特殊函数时，将会出现错误：

<模块调用时>

'A test module'



import sys

def test():
    args = sys.argv
    if len(args)==1:
        print('Hello,World!')
    elif len(args)==2:
        print('Hello, %s!' % args[1])
    else:
        print('Too many arguments!')


if _name_=='_main_':
    test()

运行报错

"E:\python\python project\myfirst\venv\Scripts\python.exe" "E:/python/python project/myfirst/vari/_first_module.py"
Traceback (most recent call last):
  File "E:/python/python project/myfirst/vari/_first_module.py", line 17, in 
    if _name_=='_main_':
NameError: name '_name_' is not defined

<面向对象编程时>

class Student(object):
    def _init_(self,name,age):
        self.name=name
        self.age=age

    def print_core(self):
        print('%s:%s' % (self.name,self.age))


stu1 = Student('tpc',26)
stu1.print_core()

报错

"E:\python\python project\myfirst\venv\Scripts\python.exe" "E:/python/python project/myfirst/vari/_first_class.py"
Traceback (most recent call last):
  File "E:/python/python project/myfirst/vari/_first_class.py", line 10, in 
    stu1 = Student('tpc',26)
TypeError: object() takes no parameters

    两个错误都是由于关键字变量和特殊函数都是使用__XXX__这样前后双下划线的格式，调用时正确调用即可避免问题出现，在此测试如下：

class Student(object):
    def __init__(self,name,age):
        self.name=name
        self.age=age

    def print_core(self):
        print('%s:%s' % (self.name,self.age))


stu1 = Student('tpc',26)
stu1.print_core()

运行结果：

"E:\python\python project\myfirst\venv\Scripts\python.exe" "E:/python/python project/myfirst/vari/_first_class.py"
tpc:26

喜欢的朋友可以扫描以下二维码进行关注，公众号将每天更新文章：