How can I filter a list of dictionaries in Python based on multiple criteria?

How can I filter a list of dictionaries in Python based on multiple criteria?

You can use list comprehensions along with conditional statements to filter a list of dictionaries. For example, if you have a list of dictionaries representing people and you want to filter by age and city, you can do it like this:

people = [
    {'name': 'Alice', 'age': 30, 'city': 'New York'},
    {'name': 'Bob', 'age': 25, 'city': 'Los Angeles'},
    {'name': 'Charlie', 'age': 35, 'city': 'New York'},
]

filtered_people = [person for person in people if person['age'] > 28 and person['city'] == 'New York']

What if I want to filter based on a list of cities instead of just one?

You can modify the condition to check if the city is in a list of cities. Here's how:

cities = ['New York', 'Los Angeles']
filtered_people = [person for person in people if person['age'] > 28 and person['city'] in cities]

Can I also sort the filtered results?

Yes, you can sort the filtered results using the sorted() function. For example:

sorted_filtered_people = sorted(filtered_people, key=lambda x: x['age'])

What if I want to filter by a nested dictionary?

You can access nested dictionaries using the appropriate keys. For example:

people = [
    {'name': 'Alice', 'info': {'age': 30, 'city': 'New York'}},
    {'name': 'Bob', 'info': {'age': 25, 'city': 'Los Angeles'}},
]

filtered_people = [person for person in people if person['info']['age'] > 28]