Sometimes, we want to filter a dict to contain only certain keys with Python.
In this article, we’ll look at how to filter a dict to contain only certain keys with Python.
How to filter a dict to contain only certain keys with Python?
To filter a dict to contain only certain keys with Python, we can use dictionary comprehension.
For instance, we write:
d = {'foo': 1, 'foobar': 2, 'bar': 3}
foodict = {k: v for k, v in d.items() if k.startswith('foo')}
print(foodict)
We have a dict d with a few keys.
And we want to create a dict that has the entries with keys that starts with 'foo'.
To do this, we loop through the items with for k, v in d.items().
And then we call k.startswith('foo') to return only the entries that starts with 'foo'.
Therefore, foodict is {'foo': 1, 'foobar': 2}.
Conclusion
To filter a dict to contain only certain keys with Python, we can use dictionary comprehension.
