do not use hasattr to check if a value is callable

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Metadata

ID: python-best-practices/use-callable-not-hasattr

Language: Python

Severity: Notice

Category: Best Practices

Description

Do not make any check using hasattr to check if a function is callable since the object may have redefine __getattr__. Instead, use callable().

Learn More

Python Documentation: callable() built-in

Non-Compliant Code Examples

hasattr(x, '__call__')  # use callable

Compliant Code Examples

callable(x)

How to use this rule

1
2
rulesets:
  - python-best-practices     # Rules to enforce Python best practices.

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