标签：实例化 help __init__ mic 过程 int ane 执行 构造函数
实例化过程 会执行__init__ 的函数方法
class SQLHelper: def __init__(self): # self = s1 print("helo") def fetch(self, sql): pass def create(self, sql): pass def remove(self, nid): pass def modify(self, name): pass # 实例化过程 会执行__init__ 的函数方法 s1 = SQLHelper() ‘‘‘ helo ‘‘‘
未改造前
class SQLHelper: def __init__(self): # self = s1 print("helo") self.hhost = "c1.salt.com" self.uuserane = "alex" self.pwd = "123" def fetch(self, sql): pass def create(self, sql): pass def remove(self, nid): pass def modify(self, name): pass # 实例化过程 会执行__init__ 的函数方法 s1 = SQLHelper() print(s1.hhost, s1.uuserane, s1.pwd) ‘‘‘ helo c1.salt.com alex 123 ‘‘‘
改造后
class SQLHelper: def __init__(self, host, username, pwd): # self = s1 print("helo") self.hhost = host self.uuserane = username self.pwd = pwd def fetch(self, sql): print(sql) def create(self, sql): pass def remove(self, nid): pass def modify(self, name): pass # 实例化过程 会执行__init__ 的函数方法 s1 = SQLHelper("c1.salt.com", "alex", "123") s2 = SQLHelper("c2.salt.com", "mike", "123456") s1.fetch("select * from A") ‘‘‘ helo helo select * from A ‘‘‘
标签：实例化 help __init__ mic 过程 int ane 执行 构造函数
原文地址：https://www.cnblogs.com/mingerlcm/p/8448743.html
