Why is it bad practice to use from module import *?
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作为一种习惯，几乎stackoverflow和示例页面中的每个人都使用
1 | t = numpy.arange(0,40000,4000) |
为什么我们不/为什么使用
1 | t = arange(0,40000,4000) |
请给我理由。(我猜：1。如果我们需要导入多个模块，那么不同模块中的一些函数共享相同的名称。2。在导入模块时==从模块导入*？我可以看到这种"习惯"导致更快的处理时间。)还有什么其他原因？
这就是《Python样式指南》所说的：
Wildcard imports (
from ) should be avoided, as they make it unclear which names are present in the namespace, confusing both readers and many automated tools. There is one defensible use case for a wildcard import, which is to republish an internal interface as part of a public API (for example, overwriting a pure Python implementation of an interface with the definitions from an optional accelerator module and exactly which definitions will be overwritten isn't known in advance).import *