Python - Basics - Dictionaries

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Explanation
In Python, we use two curly brackets { } to define a dictionary.

1. Adding Elements
dict[i] = v # Assigns the value v to the key i in the dictionary

2. Indexes
dict[i] # Returns the value of the dictionary at element i

3. Values
dict.values() # Returns a list of all the values in the dictionary

4. Keys
dict.keys() # Returns a list of all the keys in the dictionary

5. Items
dict.items() # Returns a list of (key, value) pairs in the dictionary

6. in Operator
x in dict.values() # Returns True only if x is one of the values of the dictionary
x in dict.keys() # Returns True only if x is one of the keys of the dictionary
(i, x) in dict.items() # Returns True only if the pair (key, value) is in the
dictionary

7. Length()
len(dict) # Returns the length of the dictionary (the number of keys)

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Visual Studio Code: https://code.visualstudio.com/
Python: https://python.org/downloads/
Official Python Tutorial: https://docs.python.org/3/tutorial/
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Tags
#Python #Basics #Dictionary
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