python资料查找方法

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https://www.python.org/doc/
Python 3.x Resources

• Browse Python 3.9.1 Documentation - (Module Index)
  • What's new in Python 3.9
  • Tutorial        这个
  • Library Reference
  • Language Reference
  • Extending and Embedding
  • Python/C API
  • Using Python
  • Python HOWTOs
  • Glossary
    
  
  

https://docs.python.org/3/tutorial/index.html

11. Brief Tour of the Standard Library — Part II

• 11.1. Output Formatting
• 11.2. Templating
• 11.3. Working with Binary Data Record Layouts
• 11.4. Multi-threading
• 11.5. Logging   这个
  

11.5. Logging

The logging module offers a full featured and flexible logging system. At its simplest, log messages are sent to a file or to sys.stderr:

这个  logging

https://docs.python.org/3/library/logging.html#module-logging

Format

Description

filename

Specifies that a FileHandler be created, using the specified filename, rather than a StreamHandler.

filemode

If filename is specified, open the file in this mode. Defaults to 'a'.

点这个 mode

Character

Meaning

'r'

open for reading (default)

'w'

open for writing, truncating the file first

'x'

open for exclusive creation, failing if the file already exists

'a'

open for writing, appending to the end of the file if it exists

'b'

binary mode

't'

text mode (default)

'+'

open for updating (reading and writing)