append to dict keys python code example

Example 1: how to append to a dictionary in python

d = {'a': 1, 'b': 2}
print(d)
d['a'] = 100  # existing key, so overwrite
d['c'] = 3  # new key, so add
d['d'] = 4
print(d)

Example 2: dictionary append value python

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