Wildcard(*) imports can increase production risks.

Production RiskSoftware ResiliencyProgramming Best Practices

Wildcard(*) imports can increase production risks.

This code insight counts one violation each time a wildcard import is used.

Violations pattern is:

import *

from xxx import *


Why you should care

In general, import statements should be as specific as possible and you should only import what you need. When “from module import *" is used, you are implicitly loading all locals of the imported module into and over the importing module. This has two disadvantages:

  • first, you might unintentionally overload already imported objects.
  • Second, it becomes difficult to detect undefined names in the program that imported the module.

Business Impacts

Production Risk

CAST recommendations




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