Basics of Python

list_numbers = (1,2,3,4)
sample_map = map(lambda x: x*2, list(list_numbers))
print(list(sample_map))

[2, 4, 6, 8]

some_text = ['hey! whats up','I am learning python','woha! thats amazing','thanks dude']
some_dictionary = {element:len(element) for element in some_text}
print(some_dictionary)

{'hey! whats up': 13, 'I am learning python': 20, 'woha! thats amazing': 19, 'thanks dude': 11}

numbers = [1,2,3,4,5]
some_dictionary = {num:num**2 for num in numbers}
print(some_dictionary)

{1: 1, 2: 4, 3: 9, 4: 16, 5: 25}

COUNTRIES = (
    ('AF', 'Afghanistan',),
    ('AX', 'Aland Islands',),
    ('AL', 'Albania',),
    ('DZ', 'Algeria',),
    ('AS', 'American Samoa',),
    ('AD', 'Andorra',),
    ('AO', 'Angola',),
    ('AI', 'Anguilla',),
    ('AQ', 'Antarctica',),
    ('AG', 'Antigua and Barbuda',),
    ('AR', 'Argentina',),
    ('AM', 'Armenia',),
    ('AW', 'Aruba',),
    ('AU', 'Australia',),
    ('AT', 'Austria',))

# prepare a dictionary where key is countryTitle and value is CountryCode

{a_tuple[1]:a_tuple[0] for a_tuple in COUNTRIES}

{'Afghanistan': 'AF',
 'Aland Islands': 'AX',
 'Albania': 'AL',
 'Algeria': 'DZ',
 'American Samoa': 'AS',
 'Andorra': 'AD',
 'Angola': 'AO',
 'Anguilla': 'AI',
 'Antarctica': 'AQ',
 'Antigua and Barbuda': 'AG',
 'Argentina': 'AR',
 'Armenia': 'AM',
 'Aruba': 'AW',
 'Australia': 'AU',
 'Austria': 'AT'}