Questions tagged [keyerror]

When programming in languages like Python and Ruby, a KeyError occurs as a distinct exception type raised when a dictionary (mapping) fails to find a specific key. In Python, it's classified as a subclass of LookupError, while in Ruby, it belongs under the category of IndexError.

Is it necessary to have separate try-except blocks for different KeyErrors that are closely related? Can these be combined in a single try block without sacrificing functionality?

Imagine a scenario where I need to print results from a request response. If I have multiple parameters that I want to check but may not always be present in every response, I can handle this by using a try clause to catch any KeyError. The issue is that ...

pythonkeyerrortry-except

Extracting information using Python Pandas while gracefully handling key errors

Let's explore a more nuanced question that I have, different from this one. Imagine you have a dataframe structured like this: df = A B C 0 3 3 1 1 2 1 9 When trying to access columns that don't exist, such as df[ ...

pythonpandasdataframekeyerror