Lab 5 - Bitwise operators

Author: posguy99

L5-1.py

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+# python lab 5 10-6-20
+
+# l5_1 31&14 (and)
+
+def print_padded_byte(b):
+    print(bin(b)[2:].rjust(8, '0'))
+
+
+print_padded_byte(31)
+print_padded_byte(14)
+
+print(31 & 14)

L5-10.py

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+# python lab 5 10-6-20
+
+# l5_10
+
+the_list = ['Apples', 'Pears', 'Oranges', 'Mangoes', 'Tomatoes']
+
+# print elements 2 and 3 of the list
+print(the_list[2:4])

L5-11.py

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+# python lab 5 10-6-20
+
+# l5_11
+
+the_list = ['Apples', 'Pears', 'Oranges', 'Mangoes', 'Tomatoes']
+
+# print substring [1:4] of element [3] of the list
+print(the_list[3][1:4])

L5-12.py

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+# python lab 5 10-6-20
+
+# l5_12
+
+the_list = ['Apples', 'Pears', 'Oranges', 'Mangoes', 'Tomatoes']
+
+# print substring [1:4] of element [3] of the list
+print(the_list[2][3:5])

L5-13.py

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+# python lab 5 10-6-20
+
+# l5_13 shallow copy of a list, the id() are the same indicating
+# that they are both pointers to the same list object
+
+the_list = ['Apples', 'Pears', 'Oranges', 'Mangoes', 'Tomatoes']
+
+
+print('the_list: ', the_list)
+the_new_list = the_list
+
+print('the_new_list: ', the_new_list)
+
+print('the_list', id(the_list))
+print('the__new_list', id(the_new_list))

L5-14.py

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+# python lab 5 10-6-20
+
+# l5_13 deepcopy of a list, the id() are different indicating
+# that they do not point to the same list object
+
+from copy import deepcopy
+
+the_list = ['Apples', 'Pears', 'Oranges', 'Mangoes', 'Tomatoes']
+
+
+print('the_list: ', the_list)
+the_new_list = deepcopy(the_list)
+
+print('the_new_list: ', the_new_list)
+
+print('the_list', id(the_list))
+print('the__new_list', id(the_new_list))

L5-15.py

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+# python lab 5 10-6-20
+
+# l5_15
+
+from random import randint
+
+the_list = [[randint(1, 20) for each in range(4)]for item in range(3)]
+
+print('the_list: ', the_list)
+
+# tricksy because indexes start at *zero*
+print('Second element of the second list is', the_list[1][1])
+
+# challenge 5_1
+
+for i in range(3):
+    for j in range(4):
+        print(the_list[i][j], '\t', end='')
+    print()

L5-2.py

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+# python lab 5 10-6-20
+
+# l5_2 60|14 (or)
+
+def print_padded_byte(b):
+    print(bin(b)[2:].rjust(8, '0'))
+
+
+print_padded_byte(60)
+print_padded_byte(14)
+
+print(60 | 14)

L5-3.py

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+# python lab 5 10-6-20
+
+# l5_3 60 ^ 14 (exclusive or)
+
+def print_padded_byte(b):
+    print(bin(b)[2:].rjust(8, '0'))
+
+
+print_padded_byte(60)
+print_padded_byte(14)
+
+print(60 ^ 14)

L5-4.py

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+# python lab 5 10-6-20
+
+# l5_4 125 << 2 (shift left two bits,  same as *4)
+
+def print_padded_byte(b):
+    print(bin(b)[2:].rjust(8, '0'))
+
+
+print_padded_byte(125)
+
+
+print(125 << 2)