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Illegal raise

ID: py/illegal-raise Kind: problem Security severity: Severity: error Precision: very-high Tags: - quality - reliability - error-handling Query suites: - python-code-quality.qls - python-security-and-quality.qls

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If the object raised is not a legal Exception class or an instance of one, then a TypeError will be raised instead.

Legal exception classes are:

  • Any old-style classes (Python 2 only)

  • Any subclass of the builtin class BaseException However, it recommended that you only use subclasses of the builtin class Exception (which is itself a subclass of BaseException).

Recommendation

Change the expression in the raise statement to be a legal exception.

Example

#Cannot raise an int, even if we want to def raise_int(): #Will raise a TypeError raise 4

References