Python3 basis function parameters specified parameter type in a case where the default value

 

•        Python : 3.7.3
•          OS: Ubuntu 18.04.2 LTS
•         IDE : pycharm-community-2019.1.3
•       Conda: 4.7.5
•    typesetting : Markdown

 

code

"""
@Author : 行初心
@Date   : 2019/7/4
@Blog   : www.cnblogs.com/xingchuxin
@Gitee  : gitee.com/zhichengjiu
"""


def show(name: str = "python"):
    # 想：有缺省值的参数能不能再指明一下类型呢？
    # 毕竟，代码要给其他人看的，多留一些关键信息，或许会好一点吧。
    # 第一次写时 -> def show(name="python": str) 报错.
    # 开始运用想象力与创造力，写出来了.
    # o(*￣︶￣*)o
    print(name)


def main():
    show()
    show("golang")


if __name__ == '__main__':
    main()

 

result

/home/coder/anaconda3/envs/py37/bin/python /home/coder/PycharmProjects/Base/demo.py
python
golang

Process finished with exit code 0

 

resource

• [Documents - English] docs.python.org/3
• [Documentation - Chinese] docs.python.org/zh-cn/3
• [Specification] www.python.org/dev/peps/pep-0008
• [Specification] zh-google-styleguide.readthedocs.io/en/latest/google-python-styleguide/python_language_rules
• [Source] www.python.org/downloads/source
• [ PEP ] www.python.org/dev/peps
• [Platform] www.cnblogs.com
• [Platform] gitee.com

 

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Python has an open source, cross-platform, interpreted, interactive and other characteristics, it is worth learning.
Python's design philosophy: elegant, clear and simple. Promote the use of a method, the best is only one way to do a thing.
Writing code to comply with norms, which helps communication and understanding.
Each language has unique ideas, beginners need to change the thinking, pragmatic practice, adhere to accumulate.