Question

Part2 Q1

Mini-Exercise 2 PART 1 For each snippet of code below, draw a rough memory model diagram of the state of each variable involved at the end of the code snippet. (Note: For the ID numbers, you can just make up any numbers.) Q1. >>> Isti = [1, 3] >>> Ist2 = lsti[:] >>> 1st2.append(5) Q2. >>> Isti = [1, 3] >>> 1st2 = lsti >>> Isti.append(5) >> lst1 = [0] >>> a = [[1, 2, 3), ('a', >>> b = a >>> b.append(99) Q4. >>> a = [[1, 2, 3), ('a', 'b']] >>> b = a[:] >>> b.append(99) Q5. >>> a = [[1, 2, 3], ['a', 'b'] >>> b = a[:] >>> b[0].append(99) PART 2 Q1. Follow the design recipe to write a function named "change_list" that takes in a list of lists, and changes the first element in every sublist to 0. Your function should NOT return anything.

Answer 1

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Python Code :

#Method to change list
def change_list( L ):
# Loop for itterate list L
for sub_list in L:
# Make the first element in sublist to 0
sub_list[0] = 0

# Main method
# Instalize list of lists
L = [[1,2,3,4,5],['a','b','c'],[4,3,2,1],['d','e','f']]
# Prompt for user
print("Before change a list")
#Display the list of lists
print(L)
# Call method change_list with list of lists as arguments
change_list(L)
# prompt for user
print("After change a list")
#Display the list of lists
print(L)

- O file.py - C:\Users\Vinu Bujji \Desktop\file.py (3.7.3) File Edit Format Run Options Window Help #Method to change list def change_list( L): # Loop for itterate list L for sub list in L: # Make the first element in sublist to O sub_list[0] = 0 # Main method # Instalize list of lists L = [[1,2,3,4,5], ['a','b', 'c'],[4,3,2,1],['d', 'e','f']] # Prompt for user print("Before change a list") #Display the list of lists print (L) # Call method change_list with list of lists as arguments change_list(L) # prompt for user print("After change a list") #Display the list of lists print (L) Python 3.7.3 Shell - OX File Edit Shell Debug Options Window Help Python 3.7.3 (v3.7.3:ef4ec6ed12, Mar 25 2019, 21:26:53) [MSC v.1916 32 bit (Inte 1)] on win32 Type "help", "copyright", "credits" or "license()" for more information. --- RESTART: C:\Users\Vinu Bujji\Desktop\file.py --- Before change a list [[1, 2, 3, 4, 5], ['a', 'b', 'c'], [4, 3, 2, 1], ['d', 'e','f']] After change a list [[0, 2, 3, 4, 5], [0, 'b', 'c'], [0, 3, 2, 1], [0, 'e','f']]