py5_the reuse of functions and programs

最新推荐文章于 2024-09-30 17:37:56 发布

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最新推荐文章于 2024-09-30 17:37:56 发布

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The definition of function

using Key Word “def” to define a function.

def <Function Name>(<mandatory parameters>, <alternative parameters>)
    <Main of Function>
    return <value>

Whether this function has parameter or not, the () still retain.

When define a function, some parameters can be assigned a default value to constitute alternative parameters. Mandatory parameters must before the alternative parameters.
Python provides a definition similar to the function overloading:
def (, *k), k can be any word, use this definition, you can give any amount of parameters.

Lambda Function

Lambda Function is a anonymous function, means the function has no name, Lambda Function return the name of function.
$< F u n c t i o n N a m e > = l a m b d a < p a r a m e t e r s > : < E x p r e s s i o n >$

The Pyinstaller Library

Using Pyinstaller Library to package the program as a executable file which can run without source files(.py) in many operation systems(such as MacOX, Windows, Linux).
Download in here (Use pip).
Attention: Only can use Linux/Windows command to install Pyinstaller Library.
Cmd-> pip install Pyinstaller (Windows).
Cmd-> pyinstaller -F filename(.py)

Parameter of Pyinstaller Library:

-h for help
—clean delete the temporary files while packaging.
-D, —onedir default, generate Dist file.(Not Recommend)
-F, —onefile only generate individual package-file in Dist file.
-i<picture.ico> assign the icon file of package-file.