Python Batteries

• Web Server

  % python3 -m http.server --help
  usage: server.py [-h] [--cgi] [-b ADDRESS] [-d DIRECTORY] [-p VERSION] [port]
  
  positional arguments:
  port                  bind to this port (default: 8000)
  
  options:
  -h, --help            show this help message and exit
  --cgi                 run as CGI server
  -b ADDRESS, --bind ADDRESS
                          bind to this address (default: all interfaces)
  -d DIRECTORY, --directory DIRECTORY
                          serve this directory (default: current directory)
  -p VERSION, --protocol VERSION
                          conform to this HTTP version (default: HTTP/1.0)
  

• Format String to JSON, Since Python 3.9, the params --no-ensure-ascii was introduced

  # python -m json.tool --no-ensure-ascii
  echo '{"bridge":{"IPAMConfig":null,"Links":null,"Aliases":null,"NetworkID":"713f5badd1daa56533f9739286364b7f42ab0e56073cd9d1e143a901ba465248","EndpointID":"a2d0d989c4983178c7baae84fb634760f4a99cd3c17c09928c9b74a5ce9c0438","Gateway":"10.200.0.1","IPAddress":"10.200.0.2","IPPrefixLen":24,"IPv6Gateway":"","GlobalIPv6Address":"","GlobalIPv6PrefixLen":0,"MacAddress":"02:42:0a:c8:00:02","DriverOpts":null}}' | python -m json.tool
  {
      "bridge": {
          "IPAMConfig": null,
          "Links": null,
          "Aliases": null,
          "NetworkID": "713f5badd1daa56533f9739286364b7f42ab0e56073cd9d1e143a901ba465248",
          "EndpointID": "a2d0d989c4983178c7baae84fb634760f4a99cd3c17c09928c9b74a5ce9c0438",
          "Gateway": "10.200.0.1",
          "IPAddress": "10.200.0.2",
          "IPPrefixLen": 24,
          "IPv6Gateway": "",
          "GlobalIPv6Address": "",
          "GlobalIPv6PrefixLen": 0,
          "MacAddress": "02:42:0a:c8:00:02",
          "DriverOpts": null
      }
  }
  

• Check whether the third modules are installed successfully

  % python -c "import paramiko"
  Traceback (most recent call last):
  File "<string>", line 1, in <module>
  ImportError: No module named paramiko
  % python3 -c "import IPy"
  %
  

• Url decode UTF-8 in Python

  from urllib.parse import unquote
  url = unquote(url)
  

  示例：

  % python3
  Python 3.12.2 (main, Feb 20 2024, 04:30:04) [Clang 14.0.0 (clang-1400.0.29.202)] on darwin
  Type "help", "copyright", "credits" or "license" for more information.
  >>>
  >>> from urllib.parse import unquote
  >>> url = "https://zh.wikipedia.org/wiki/%E5%A6%82%E4%BD%95%E9%96%B1%E8%AE%80%E4%B8%80%E6%9C%AC%E6%9B%B8"
  >>> unquote(url)
  'https://zh.wikipedia.org/wiki/如何閱讀一本書'