Today I have learned basic in python

 List

Lists are used to store multiple items in a single variable.

Lists are one of 4 built-in data types in Python used to store collections of data, the other 3 are Tuple, Set, and Dictionary, all with different qualities and usage.

List Items

List items are ordered, changeable, and allow duplicate values.

List items are indexed, the first item has index [0], the second item has index [1] etc.


Ordered

When we say that lists are ordered, it means that the items have a defined order, and that order will not change.

If you add new items to a list, the new items will be placed at the end of the list.

listnew=["apple","banana","grapes"]

listnew.append("orange")

listnew.insert(1,"kiwi")

new1=["mango","cherry"]

listnew.extend(new1)

listnew.remove("apple")

listnew.pop(2)

del listnew[1]

print(listnew)

Output:

['kiwi', 'orange', 'mango', 'cherry']

How to add elements in a tuple in Python?

  • Python program to demonstrate the addition of elements in a Tuple. Initial empty Tuple: () Tuple with the use of String: ('Geeks', 'For') Tuple using List: (1, 2, 4, 5, 6) Tuple with the use of function: ('G', 'e', 'e', 'k', 's') Creating a Tuple with Mixed Datatypes.
  • What is a tuple data type in Python?

    • The built-in tuple data type is probably the most elementary sequence available in Python. Tuples are immutable and can store a fixed number of items. For example, you can use tuples to represent Cartesian coordinates (x, y), RGB colors (red, green, blue), records in a database table (name, age, job), and many other sequences of values.

    • veg=("brinjal","tomato","ladiesfinger")
      (blue,red,green)=veg
      print(blue)
      print(red)
      print(green)
    • Output:

      brinjal
      tomato
      ladiesfinger
    • What is a set in Python?

      • Set is one of 4 built-in data types in Python used to store collections of data, the other 3 are List, Tuple, and Dictionary, all with different qualities and usage. A set is a collection which is unordered, unchangeable*, and unindexed. * Note: Set items are unchangeable, but you can remove items and add new items.
      • What are set operations in Python?

        • Below is a list of the set operations available in Python. Some are performed by operator, some by method, and some by both. The principle outlined above generally applies: where a set is expected, methods will typically accept any iterable as an argument, but operators require actual sets as operands.

        • fruits={"apple","banana","berry"}
          newvar={1,2,3,4,5}
          output=fruits.union(newvar)
          print(output)
        • Output:

          {1, 2, 3, 4, 5, 'banana', 'berry', 'apple'}

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