Python中小错误 之 object() takes no parameters

# python 构造函数的使用方法
# by 桑榆

class Test:
    def _init_(self,name):
        self.name = name
        print("%s Welcome to python!" % self.name)

test = Test('sangyu')

报错如下：

Traceback (most recent call last):
  File "D:/Code/Python/First_test/helloworld.py", line 9, in <module>
    test = Test('sangyu')
TypeError: object() takes no parameters

错误原因：

__init__()构造函数的左右下划线都是两个，只用了一个，导致错误。

修改后：

# python 构造函数的使用方法
# by 桑榆

class Test:
    def __init__(self,name):
        self.name = name
        print("%s Welcome to python!" % self.name)

test = Test('sangyu')


D:\SoftWare\Python\python.exe D:/Code/Python/First_test/helloworld.py
sangyu Welcome to python!

Process finished with exit code 0