Python eight kinds of classic collection of data structures

8 classical data structures commonly used in Python

• Pythn native data structures: Tuple(), List(), Set(), Dictionary{A:B}
• Data structures in the NumPy package: array Ndarray (with multiple operations), matrix Matrix (multiple linear algebra calculations)
• Data structures in the Pandas package: Series (index + 1 column of data), DataFrame (index + multi-column data table)

3 Set

3.1 Creating a Collection

Collection creation.There are no repeated elements, {}, if the elements are numbers, they are sorted by size; use the set() function to create a set, which will automatically split a string consisting of multiple letters

mySet1 = set('abcdefghi'); print(mySet1)mySet2