Python的50道陰影
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This document contains notes on various Python topics including common errors, variables, garbage collection, interfaces, packages, and code quality. It discusses issues like indentation errors, global vs local variables, reference counting, weak references, iterating over lists, installing packages with pip, converting Python 2 code to Python 3, and using tools like flake8. The document provides an overview of key elements of the Python language.
Python的50道陰影
- 1. Python 50
- 3. •
- 7. File "test.py", line 6 print "yoshi" ^ IndentationError: unexpected indent
- 8. • Python Tab • Tab
- 10. Parsing pop pop
- 11. • Tab • Editor Tab
- 13. default argument
- 14. • Python def argument •
- 16. closure
- 19. • closure Python • reference Python lexical scope) • closure gc
- 22. • 1. class __call__ lexical scope • 2. functool.partial
- 23. Global Variable
- 25. global local
- 28. Dead or Alive
- 31. • del symbol table reference count -1 • reference count 0 GC, __del__
- 32. Circular reference • 2016 Python • __del__. Python
- 33. • circular reference. weak reference. • weak reference reference count. • Python gc
- 34. Interface • interface • base class Python
- 37. List Related
- 38. • iterate list • list
- 40. Package • sudo pip • virtualenv • requirements.txt dependency • setup.py
- 41. • pip freeze > requirements.txt • • • Conflict merge
- 43. 2 == > 3 • python 3 • __future__, six • print_function • absolute_import • io.open 2.7 encoding
- 44. Quality • flake8 —install-hook • commit pep8 • # noqa
- 48. Any Question?