Internet Modules and Tools
This section summarizes Python’s support for Internet scripting.
Commonly Used Library Modules
Following are some of the more commonly used modules in the Python Internet modules set. This is just a representative sample; see the Python Library Reference for a more complete list.
Low-level network communications support (TCP/IP, UDP, etc.). Interfaces for sending and receiving data over BSD-style sockets:
socket.socket( )makes an object with socket call methods (e.g.,
object.bind( )). Most protocol and server modules use this module internally.
Interfaces to Unix and Windows
selectfunction. Waits for activity on one of
Nfiles or sockets. Commonly used to multiplex among multiple streams, or to implement timeouts. Only works for sockets on Windows, not files.
Server-side CGI script support:
cgi.FieldStorageparses the input stream;
cgi.escapeapplies HTML escape conventions to output streams. To parse and access form information: after a CGI script calls
formis a dictionary-like object with one entry per form field (e.g.,
form["name"].valueis form field
Fetches web pages and server script outputs from their Internet addresses (URLs):
)returns file with
). Supports HTTP, FTP, gopher, local file URLs. Also has tools for escaping URL text:
)does URL escapes for text inserted into HTML output streams. ...