How to use Dictionary in Python | Python Beginners | தமிழ்
In this Video, you'll learn everything about Python dictionaries. How they are created, accessing, adding, removing elements from them and various built-in methods.
Python dictionary is an unordered collection of items. Each item of a dictionary has a key/value pair.
Dictionaries are optimized to retrieve values when the key is known.
Python Dictionary:
1. Creating Python Dictionary.
2. Accessing Elements from Dictionary.
3. Changing and Adding Dictionary elements.
4. Removing elements from Dictionary.
5. Python Dictionary Methods.
6. Dictionary Membership Test.
7. Iterating Through a Dictionary.
8. Dictionary Built-in Functions.
Python Dictionary Methods:
Method Description
clear() Removes all items from the dictionary.
copy() Returns a shallow copy of the dictionary.
fromkeys(seq[, v]) Returns a new dictionary with keys from seq and value equal to v (defaults to None).
get(key[,d]) Returns the value of the key. If the key does not exist, returns d (defaults to None).
items() Return a new object of the dictionary's items in (key, value) format.
keys() Returns a new object of the dictionary's keys.
pop(key[,d]) Removes the item with the key and returns its value or d if key is not found. If d is not provided and the key is not found, it raises KeyError.
popitem() Removes and returns an arbitrary item (key, value). Raises KeyError if the dictionary is empty.
setdefault(key[,d]) Returns the corresponding value if the key is in the dictionary. If not, inserts the key with a value of d and returns d (defaults to None).
update([other]) Updates the dictionary with the key/value pairs from other, overwriting existing keys.
values() Returns a new object of the dictionary's values
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