Python3基础 A类作为B类的实例变量

Posted 2021-01-08 xingchuxin

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•                    python : 3.7.0
•                           OS : Ubuntu 18.04.1 LTS
  
•                          IDE : PyCharm 2018.2.4
•                      conda : 4.5.11
•            type setting : Markdown

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code

"""
@Author : 行初心
@Date   : 18-9-23
@Blog   : www.cnblogs.com/xingchuxin
@GitHub : github.com/GratefulHeartCoder
"""


class Girls:
    def __init__(self, num):
        self.num = num


class Boys:
    def __init__(self, num):
        self.num = num


class Class:
    # 组合，其他类的实例化，在这里类的实例化中进行
    def __init__(self, boy_num, girl_num):
        self.boys = Boys(boy_num)
        self.girls = Girls(girl_num)

    def introduction(self):
        print("班级共有", self.boys.num, "个男生")
        print("班级共有", self.girls.num, "个女生")


def main():
    my_class = Class(boy_num=20, girl_num=30)
    my_class.introduction()


if __name__ == ‘__main__‘:
    main()

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result

/home/coder/anaconda3/envs/py37/bin/python /home/coder/PycharmProjects/oop/demo.py
班级共有 20 个男生
班级共有 30 个女生

Process finished with exit code 0

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resource

• [文档] https://docs.python.org/3/
• [规范] https://www.python.org/dev/peps/pep-0008/
• [规范] https://zh-google-styleguide.readthedocs.io/en/latest/google-python-styleguide/python_language_rules/
• [源码] https://www.python.org/downloads/source/
• [ PEP ] https://www.python.org/dev/peps/
• [平台] https://www.cnblogs.com/

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Python具有开源、跨平台、解释型、交互式等特性，值得学习。
Python的设计哲学：优雅，明确，简单。提倡用一种方法，最好是只有一种方法来做一件事。
代码的书写要遵守规范，这样有助于沟通和理解。
每种语言都有独特的思想，初学者需要转变思维、踏实践行、坚持积累。