python command line arguments example

2018年7月3日 北京实时天气：热，比前几天好点，扇着风扇很舒服。Study Python multi-version coexistence problem: Windows7 64-bit system, installed Python2.7 and Python3.5, how to set the default version at the command line?This is a big problem. 今天找到了办法：You can fix it by setting the environment variable, which one is in front, which is the default version under the

simply represents a switch state, that is, when no additional parameters are followed. When an optional item is followed by an additional parameter, the Write option character in the parse string is appended with a ":" Number. So "ho:" means "h" is a switch option; "O:" indicates that a parameter should be followed.4. Use the long format to parse the list of strings: ["Help", "output="]. Long format strings can also have a switch state, which is not followed by the "=" number. If you follow an

Use getopt. getopt () To analyze command line parameters Number. Getopt is a module used to analyze command line parameters. Functions in the module: Getopt (ARGs, options [, long_options]) ARGs is generally SYS. argv [1:]. Options is a string consisting of option letters (starting with "-"). If an option letter carri

parameters are explained as follows:Name or Flags: command-line parameter name or option, such as-P,--portActionStore: Default action mode, store value to specified variableStore_const: Store values specified in the const section of the parameter, commonly used to implement non-Boolean command-line flagStore_true/stor

In the afternoon, when the fried eggs to see dthalo eggs Friends of the series of pixels overload chicken, you want to try a Python script to draw a, old boy video of the homework really no interest, do not make it boring, to good writing, their control is not good, ability is not enough.So it is to find themselves interested in the first practice practiced hand, first realized, and then slowly decoupled.* 1, because of limited color, to the overloade

Automatic completion in Vim editor modeDownload pydiction PluginUnzip-q Pydiction.zipMkdir-p ~/.vim/after/ftplugin/Mkdir-p ~/.vim/tools/pydiction/CD pydiction-1.2CP Python_pydiction.vim ~/.vim/after/ftplugin/CP complete-dict ~/.vim/tools/pydiction/ Vim ~/.VIMRC Add:FileType plugin onLet g:pydiction_location = ' ~/.vim/tools/pydiction/complete-dict '2. Auto-completion in command-line modeCreate file ~/.py

Each script has its own expertise.There is a time to achieve a work, the use of Shell,php,python look at the file type, inconvenient handover, looking also more trouble .It is also necessary to reduce the number of file types.Scenario encountered: The shell program needs to get information from the JSON and continue processing.File, Json.txt{ "name":"China", "Province": [{ "name":"Heilongjiang", "Cities": { " City": ["Ha

If you read a file directly at the command line with input and raw_input, and want to take the file directly into the command line to handle it,The input method can be processed directly, and if you want to use the Raw_input method, the read-in file address is quoted, and you need to manually remove the quotation marks

Shell command line, one-click creation of python Template File Script method, shellpython When writing a python file, each file must start with a version and code. Every time I paste these two sentences after the touch file, I will be bored. Because I have not installed python