/Python/Defaultdict python dict inside dict

Defaultdict python dict inside dict

Python defaultdict to dict

>>> #You can simply call dict:
>>> a
defaultdict(<type 'list'>, {'1': ['b', 'a'], '3': ['b'], '2': ['a']})
>>> dict(a)
{'1': ['b', 'a'], '3': ['b'], '2': ['a']}

# but remember that a defaultdict is a dict
# (with some special behavior, check source):
>>> isinstance(a, dict)
True

Source: stackoverflow.com

Defaultdict python dict inside dict

nums = [1, 2, 1, 1, 4, -4, 2, 2, 4, 2, 5, 7]
dict_in_dict = defaultdict(dict)
for i in range(0, len(nums), 3):
    dict_in_dict[nums[i+1]][nums[i]] = -1*nums[i+2]
dict(dict_in_dict)

# result
# {2: {1: -1, 2: -4}, 4: {1: 4}, 5: {2: -7}}

Similar codes

0 vote137 views4 answers
Python prevent print output
Python
0 vote123 views1 answer
How to access item in list private in python
Python
1 vote119 views1 answer
Python - count the frquency of a vlaue in a coulmn
Python
5 votes127 views2 answers
Python pandas drop column by index
Python
0 vote123 views1 answer
Access Google Photo API with Python using google-api-python-client
Python
0 vote128 views1 answer
Regular Expression to Stop at First Match
Python
0 vote131 views2 answers
Python open excel application
Python
0 vote123 views2 answers
How to store data in python
Python
0 vote160 views1 answer
Numpy documentation realpython
Python
25 votes136 views5 answers
Create an env in python
Python