August 2018
Intermediate to advanced
332 pages
9h 12m
English
Content preview from Clean Code in Python
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Detecting incompatible signatures with Pylint
Another strong violation of LSP is when, instead of varying the types of the parameters on the hierarchy, the signatures of the methods differ completely. This might seem like quite a blunder, but detecting it would not always be so easy to remember; Python is interpreted, so there is no compiler to detect these type of error early on, and therefore they will not be caught until runtime. Luckily, we have static code analyzers such as Mypy and Pylint to catch errors such as this one early on.
While Mypy will also catch these type of error, it is not bad to also run Pylint to gain more insight.
In the presence of a class that breaks the compatibility defined by the hierarchy (for example, by changing ...
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