###### Arithmetic ###### add = lambda x, y : x + y print(f'Rslt = {add(5, -9)}') ###### List Comprehension ###### num_list = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] squares = list(map(lambda x: x ** 2, num_list)) print(f'\n Squares: \n {squares}') ###### Lambda Key ###### dict_alpha = [(1, 'z'), (2, 'a'), (3, 'b')] sorted_list = sorted(dict_alpha, key=lambda x: x[1]) print(f'\n Sorted List: \n {sorted_list}') p_info = [ (1, {'name': 'Charlie', 'email': '[email protected]'}), (2, {'name': 'Bob', 'email': '[email protected]'}), (3, {'name': 'Alice', 'email': '[email protected]'}) ] pii = [ ( {'name': 'Charlie', 'email': '[email protected]'}, {'name': 'Bob', 'email': '[email protected]'}, {'name': 'Alice', 'email': '[email protected]'} ) ] # sort by name contacts = sorted(p_info, key=lambda x: x[1]['name']) print(f'\n p_info: \n {contacts}') contacts = sorted(pii, key=lambda x: x[1:]) print(f'\n pii: \n {contacts}') # sort by email contacts = sorted(p_info, key=lambda x: x[1]['email']) print(f'\n p_info: \n {contacts}') contacts = sorted(pii, key=lambda x: x[2:]) print(f'\n PII: \n {contacts}') ####### Filter ###### num_list = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] hash_keys = list(filter(lambda x: x % 3 == 0, num_list)) print(f'\n Hash_keys for pos: \n {hash_keys}') ####### Dictionary ###### ops = { '+': lambda x, y: x + y, '-': lambda x, y: x-y } print(f'\n {ops["+"](2, -12)}') print(f'\n {ops["-"](2, -12)}') ####### Reduce ###### from functools import reduce num_list = [1, 2, 3, 4] product = reduce(lambda x, y: x * y, num_list) print(f'\n reduce: Product: {product}')