Python: import Module and Class

最新推荐文章于 2024-07-22 14:12:09 发布

原创最新推荐文章于 2024-07-22 14:12:09 发布 · 1.5k 阅读

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本文介绍了Python中模块和包的基本概念及使用方法，包括如何定义函数和类，并通过具体的例子展示了如何导入并使用这些模块。同时，文章还解释了Python包的工作原理，即每个包都是包含__init__.py文件的目录。

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Module: function_set.py

def print_function( name ):
    print "hello, %s" % name;
    return

Class: Person.py

class Person:
    '''
    classdocs
    '''
    name = "";
    age = 0;
    gender = "Unknown";
    
    


    def __init__(self, name, age, gender):
        '''
        Constructor
        '''
        self.name = name;
        self.age = age;
        self.gender = gender;
        
    def print_info(self):
        
        print "Name: %s, Age: %d, Gender: %s" % (self.name, self.age, self.gender);

import:

from function_set import print_function
from Person import Person

print_function("tes1t");

p = Person("John Smith", 28, "Male");

p.print_info();

Note:

Each package in Python is a directory which MUST contain a special file called __init__.py. 
This file can be empty, and it indicates that the directory it contains is a Python package, 
so it can be imported the same way a module can be imported.

http://www.learnpython.org/Modules_and_Packages