Asked By – Chris.Jie
Given the list
['a','ab','abc','bac'], I want to compute a list with strings that have
'ab' in them. I.e. the result is
['ab','abc']. How can this be done in Python?
Now we will see solution for issue: Filtering a list of strings based on contents
This simple filtering can be achieved in many ways with Python. The best approach is to use “list comprehensions” as follows:
>>> lst = ['a', 'ab', 'abc', 'bac'] >>> [k for k in lst if 'ab' in k] ['ab', 'abc']
Another way is to use the
filter function. In Python 2:
>>> filter(lambda k: 'ab' in k, lst) ['ab', 'abc']
In Python 3, it returns an iterator instead of a list, but you can cast it:
>>> list(filter(lambda k: 'ab' in k, lst)) ['ab', 'abc']
Though it’s better practice to use a comprehension.
This question is answered By – Eli Bendersky
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