Beginner's Python Learning Notes · Dictionary Chapter

May 14, 2023859

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The text discusses the basics of dictionaries in Python. It explains the format of dictionaries and how to add and delete key-value pairs. It also mentions the use of the "items()" method for looping through dictionaries. An example is provided to demonstrate the usage of dictionaries.

Learning knows no bounds, we will never stop

Basic format of a dictionary:
(d is the name of the dictionary)

d = {
        "key1": "value1", 
        'key2 (number)': 123
         }

I am a separator~

Ways to add dictionary values:

d["I am a new key"] = "I am a new value"

or:

d.setdefault("I am a new key","I am a new value")

Ways to delete key-value pairs:

del d["I am a new key"]
#Delete a single key-value pair

or:

d.popitem()
#Delete a random key-value pair

I am a separator~

dict.items()
↑Used when iterating over a dictionary, feels like magic

Example:
key = {
    "nima" : "Python",
    "niniang" : "Java" ,
    "ni" : "C#"
}
for key1,values in  key.items():
    print(key1,values)

Output:
nima Python
niniang Java
ni C#

I am a separator~