ValueError: Attempted relative import in non-package

Reference:Python:Relative import 相对路径 ValueError: Attempted relative import in non-package

包含相对路径import 的python脚本不能直接运行,只能作为module被引用。原因正如手册中描述的,所谓相对路径其实就是相对于当前module的路径,但如果直接执行脚本,这个module的name就是“main”, 而不是module原来的name, 这样相对路径也就不是原来的相对路径了,导入就会失败,出现错误“ValueError: Attempted relative import in non-package”

Note that both explicit and implicit relative imports are based on the name of the current module. Since the name of the main module is always __main__, modules intended for use as the main module of a Python application should always use absolute imports.

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