# this file available at: https://arachnoid.com/files/python01/
# type: ignore

# See https://www.w3schools.com/python/python_datatypes.asp

def show_type(x):
    # argument -> string for easier formatting
    ds=f'{x}'
    if ds =='True':
        ds = 'True|False'
    # acquire type string
    ts = type(x).__name__
    if ts == 'str':
        ts = 'string'
    if ds == 'nan':
        ts = 'float (Not a Number)' 
    print(f'{ds:<42} : {ts}')
     
data_types = ( 
    True,
    5,
    5.678,
    float("nan"),
    3+4j,
    '"text"',
    b"text",
    bytearray(3),
    memoryview(bytes(3)),
    show_type,
    [1,2,3],
    (1,2,3),
    {1,2,3},
    frozenset({1,2,3}),
    {'key1':'value1','key2':'value2'},
    range(5),
    None
)

def main():
    print('Python Data Types\n')

    print(f'{"Example":<42} : Type')
    print('-' * 60)

    for x in data_types: 
        show_type(x)

    print()
    print('Data in a [list] can be changed.')
    print('Data in a (tuple) cannot be changed.')
    print('Data in a {set} are unique / have no duplicates.')
    print('Data in a {frozenset} cannot be changed.')
    print('{ keys : values } in a dict can be nearly anything.')

if __name__ == "__main__":
    main()