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Python Python Collections (2016, retired 2019) Dictionaries Dictionary Basics

Posted by Tiago Ramos
Tiago Ramos
2,380 Points

Trying to insert a list inside the dictionary

Hi friends,

I'm trying to insert this list inside the dictionary, this is the 3rd time I try. Please somebody show me how I do it, I worked hard on this.

By the way, to insert the dictionary inside a dictionary I just need to declare it like a did rigth?

Thans a bunch mates :)

dicts.py 
player = {"name": "string", "remaining_lives": 3}


dictionary = {"items":{"key1": 3, "key2": "value2"}}

levels = {"levels": [1, 2, 3, 4]}
dictionary.update(levels)
Krishna Pratap Chouhan
Krishna Pratap Chouhan
15,203 Points

https://teamtreehouse.com/community/trying-to-insert-a-list-and-dictionary-inside-another-dictionary

1 Answer

Jon Mirow
Jon Mirow
9,864 Points
Jon Mirow
Jon Mirow
9,864 Points

Hi there!

The update method of a dictionary is for importing the key:value pairs of another dictionary. Is this what you were looking to achieve?

Your question sounds like you wanted to know how to add lists or dictionaries to existing dictionaries? Just to recap, only imutable types can be keys (no lists, dictionaries, sets, user defined objects without a "hash" method), but anything can be a value. For example

my_dict = {}

# Add a list:
my_dict["my_list"] = [3, 1, 4, 1, 5, 9, 2]

# Add a dictionary:
my_dict["sub_dict"] = {"key": "value"}

# Add a set:
my_dict["my_set"] = set([3, 1, 4, 1, 5, 9, 2])

# Add a Tuple as a key and as a value:
my_dict[(27.9878, 86.9250)] = ("Everest", "Nepal", 8848)

# Prove it all worked:
for key, value in my_dict.items():
  print("Key: {}\nValue: {}\n\n".format(key,value))

Note if a tuple is a key, all the values in the tuple must be valid key types too :)

Hope it's helpful