Wednesday, May 27, 2020

How to filter a list of dictionaries in python

# This is a list of dictionaries in python
list_of_dictionaries = [{'id':2, "name":"python"}, {'id':1, "name":"import"}, {'id':3, "name":"bye!"}]

# This is the list, filtered by the 'name' key
# returns a list that contains one element -- the dictionary with id == 1
filteredlist = list(filter(lambda d: d['name'] in ['import'], list_of_dictionaries))


# This is the list, filtered by the 'name' key
# returns a list that contains two dictionaries
filteredlist = list(filter(lambda d: d['name'] in ['import','python'], list_of_dictionaries))


# understanding the filter function
# https://docs.python.org/3/library/functions.html#filter

# understanding what lambda means
# https://docs.python.org/3/tutorial/controlflow.html#lambda-expressions

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