my_dict = {}
my_dict['A'] = 1
my_dict['B'] = 2
my_dict['C'] = 3

# Or alternatively:

my_dict = {
    'A': 1, 'B': 2, 'C': 3
}
my_dict = {}
my_dict['A'] = 1
my_dict['B'] = 2
my_dict['C'] = 3

# Or alternatively:

my_dict = {
    'A': 1, 'B': 2, 'C': 3
}
# Or alternatively: