Python Crawler Learning Record

In regular expressions (. *?) is a commonly used matching pattern that matches characters other than line breaks, is a non-greedy mode, and reads minimal matching information

In compilation mode, RE is used. S can let (. *?) Matches any character, including line breaks.

Try

Except Exception, E:

Print E

Catch all exceptions and print exception information

Dir (), view all available methods of the current object, type () view the type of the current object

Sys.exit (), Os.exit () is used to exit the process, the first common

Python Crawler Learning Record