python和java类的编写（属性私有化，方法公开化）

初始化类的属性的2种写法：
如下要注意python对文件名称、类、方法名的命名

方式一：原始的定义

class User1:
# 初始化账号和密码
def __init__(self):
    # 账号和密码
    self.__username = None
    self.__password = None

def getnsername(self):
    return self.__username

def getpassword(self):
    return self.__password

def setusername(self, username):
    self.__username = username

def setpassword(self, password):
    self.__password = password


if __name__ == '__main__':
	usr1 = User1()
 	usr1.setusername("admin")
	usr1.setpassword("8888")
	print(usr1.getnsername())
	print(usr1.getpassword())
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方式二：可以跳过pytest的限制（pytest的对类的方法不能有init()方法）

class User:
# 初始化类的属性：账号、密码
__username = None
__password = None

def getname(self):
    return self.__username

def getpassword(self):
    return self.__password

def setusername(self, username):
    self.__username = username

def setpassword(self, password):
    self.__password = password


if __name__ == '__main__':
	usr = User()
	usr.setusername("admin")
	usr.setpassword("8888")
	print(usr.getname())
	print(usr.getpassword())
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三、pytest的命名规则：

1.模块名必须以test_开头或者以_test结尾
2.测试类必须以Test开头，并且不能有init方法
3.测试方法以test开头
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四、方式二和java的对类的定义是一样的：

创建User类：（可以对比其相似度）

public class User {
	private String username;
	private String password;

	public User() {
    	super();
	 }

	public String getUsername() {
    	return username;
		}

	public String getPassword() {
    		return password;
		}

	public void setUsername(String username) {
   		 this.username = username;
		}

 	public void setPassword(String password) {
    			this.password = password;
	 		}

		public User(String username, String password) {
    			this.username = username;
   		 		this.password = password;
		}

	@Override
	 public String toString() {
    		return "User{" +
            	"username='" + username + '\'' +
           	 ", password='" + password + '\'' +
           	 '}';
		}

	public static void main(String[] args) {
   		User user = new User();
    	user.setUsername("admin");
   		user.setPassword("8888");
    	System.out.println(user.getUsername());
    	System.out.println(user.getPassword());

	}

}
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