Python list tuple dictionary

 Python list tuple dictionary full notes in english and tamil

Sure, I'd be happy to provide you with an overview of Python lists, tuples, and dictionaries.

## Lists:

A list in Python is an ordered collection of items that can hold a mix of different data types. Lists are defined using square brackets `[]` and items are separated by commas. They are mutable, meaning you can modify their contents after creation.

### Creating Lists:

```python

my_list = [1, 2, 3, 'apple', 'banana', True]

empty_list = []

```

### Accessing Elements:

You can access elements in a list using indexing (starting from 0) and negative indexing (starting from -1 for the last element).

```python

print(my_list[0])       # Output: 1

print(my_list[-1])      # Output: True

```

### List Methods:

- `append(item)`: Adds an item to the end of the list.

- `insert(index, item)`: Inserts an item at the specified index.

- `remove(item)`: Removes the first occurrence of the specified item.

- `pop(index)`: Removes and returns the item at the specified index.

- `index(item)`: Returns the index of the first occurrence of the item.

- `len(list)`: Returns the number of elements in the list.

## Tuples:

A tuple is similar to a list but is immutable, meaning you can't change its contents after creation. Tuples are defined using parentheses `()` or just commas.

### Creating Tuples:

```python

my_tuple = (1, 2, 3, 'apple', 'banana')

single_item_tuple = (5,)  # Note the comma after the single item

```

### Accessing Elements:

You access tuple elements in the same way as list elements, using indexing and negative indexing.

### Tuple Methods:

Tuples have fewer methods compared to lists because they are immutable. Common methods include `count()` and `index()`.

## Dictionaries:

A dictionary is an unordered collection of key-value pairs. Each key must be unique, and keys are used to access their corresponding values. Dictionaries are defined using curly braces `{}`.

### Creating Dictionaries:

```python

my_dict = {'name': 'John', 'age': 30, 'city': 'New York'}

empty_dict = {}

```

### Accessing Values:

You can access values in a dictionary using keys.

```python

print(my_dict['name'])  # Output: John

```

### Dictionary Methods:

- `keys()`: Returns a list of all the keys.

- `values()`: Returns a list of all the values.

- `items()`: Returns a list of key-value tuples.

- `get(key, default)`: Returns the value for the specified key. If the key doesn't exist, it returns the default value.

Remember that Python's documentation is a great resource for detailed information on these data structures: https://docs.python.org/3/tutorial/datastructures.html

Keep in mind that the above information is just a brief overview of lists, tuples, and dictionaries in Python. There's a lot more you can do with these data structures, so feel free to explore and experiment!