python – Whats the difference between () vs [] vs {}?

python – Whats the difference between () vs [] vs {}?

() – tuple

A tuple is a sequence of items that cant be changed (immutable).

[] – list

A list is a sequence of items that can be changed (mutable).

{} – dictionary or set

A dictionary is a list of key-value pairs, with unique keys (mutable). From Python 2.7/3.1, {} can also represent a set of unique values (mutable).

  • () is a tuple: An immutable collection of values, usually (but not necessarily) of different types.
  • [] is a list: A mutable collection of values, usually (but not necessarily) of the same type.
  • {} is a dict: Use a dictionary for key value pairs.

For the difference between lists and tuples see here. See also:

python – Whats the difference between () vs [] vs {}?

() - tuple
[] - list
{} - dictionary

All Python tutorials should cover this. Here is a good place to start.

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