[Python list as dict value] Best practice to use list as dict value #python #dict #list

list_in_dict.py

dic = dict()
key, value = 'some key', 'some value'
dic[key] = dic.get(key, []) + [value]
dic.setdefault(key,[]).append(value)

# doesn't work: 
# dic[key] = dic.get(key, []).append(value)

# https://docs.python.org/3/library/stdtypes.html#dict.setdefault