Python 包的引入顺序到底是怎样的？

Question

文件结构如下:$tree..├──main.py├──os.py└──platform.pymain.py:importplatformimportosimportsysprint('Nowinmain,Start`entercodehere`toExecfollowing')print(os.getcwd())print(sys.modules['platform'].__file__)print(platform.processor())os.py:print('Nowinos.pymodule')platform.py:print('Nowinplatform.pymodule')当我运行pythonmain.py，结果如下:$pythonmain.pyNowinplatform.pymoduleNowinmain,StarttoExecfollowing/Users/michael/Code/00-Temp/pkg_import/Users/michael/Code/00-Temp/pkg_import/platform.pyTraceback(mostrecentcalllast):File"main.py",line9,inprint(platform.processor())AttributeError:module'platform'hasnoattribute'processor'问题1：os和platform都是内置模块,当importos，默认走到了内置模块,但是importplatform,却获取了同级目录下的plarform，为何出现这个现象呢？问题2：同样的脚本，我在Pycharm中直接运行main.py，却报这个错误：/Users/michael/anaconda3/bin/python/Users/michael/Code/00-Temp/pkg_import/main.pyNowinos.pymoduleFatalPythonerror:initsite:FailedtoimportthesitemoduleTraceback(mostrecentcalllast):File"/Users/michael/anaconda3/lib/python3.7/site.py",line570,inmain()File"/Users/michael/anaconda3/lib/python3.7/site.py",line547,inmainknown_paths=removeduppaths()File"/Users/michael/anaconda3/lib/python3.7/site.py",line126,inremoveduppathsdir,dircase=makepath(dir)File"/Users/michael/anaconda3/lib/python3.7/site.py",line91,inmakepathdir=os.path.join(*paths)AttributeError:module'os'hasnoattribute'path'Processfinishedwithexitcode1

Answer 1

如果是python环境那么，导包会先从同级目录去找你导入的模块。如果找不到，回去python内置的第三方包去查找模块。完整的查找方式为：同级方法<--同级模块<--同级包<--第三方包