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Python的50道陰影
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.
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Python的50道陰影
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- 7. File "test.py", line6 print "yoshi" ^ IndentationError: unexpected indent
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- 14. • Python defargument •
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- 19. • closure Python •reference Python lexical scope) • closure gc
- 22. • 1. class __call__ lexical scope • 2. functool.partial
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- 31. • del symboltable reference count -1 • reference count 0 GC, __del__
- 32. Circular reference • 2016Python • __del__. Python
- 33. • circular reference.weak reference. • weak reference reference count. • Python gc
- 34. Interface • interface • baseclass Python
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- 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
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