__init__ method is a generator¶
ID: py/init-method-is-generator Kind: problem Security severity: Severity: error Precision: very-high Tags: - quality - reliability - correctness Query suites: - python-code-quality.qls - python-security-and-quality.qls
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The __init__ method of a class is used to initialize new objects, not create them. As such, it should not return any value. By including a yield expression in the method turns it into a generator method. On calling it will return a generator resulting in a runtime error.
Recommendation¶
The presence of a yield expression in an __init__ method suggests a logical error, so it is not possible to suggest a general fix.
Example¶
In this example the __init__ method contains a yield expression. This is not logical in the context of an initializer.
class InitIsGenerator(object): def __init__(self, i): yield i
References¶
Python: The init method.