PYTHON

append dictionary to list python

a_dictionary = {"name" : "John", "age" : 20}
a_list = []

dictionary_copy = a_dictionary.copy()
a_list.append(dictionary_copy)

print(a_list)

python append value to dictionary list

import collections

a_dict = collections.defaultdict(list) # a dictionary key --> list (of any stuff)
a_dict["a"].append("hello")

print(a_dict)
>>> defaultdict(<class 'list'>, {'a': ['hello']})

a_dict["a"].append("kite")

print(a_dict)
>>> defaultdict(<class 'list'>, {'a': ['hello', 'kite']})

dictionary append value python

d = {1:2}
d.update({2: 4})
print(d) # {1: 2, 2: 4}

append to list in dict python

from collections import defaultdict
dates_dict = defaultdict(list)
for key, date in cur:
    dates_dict[key].append(date)

how to add element to list value in a dict python

dates_dict.setdefault(key, []).append(date)