Question

using python

1.

#Write a function called multiply_by_index. multiply_by_index
#should have one parameter, a list; you may assume every item
#in the list will be an integer. multiply_by_index should
#return a list where each number in the original list is
#multipled by the index at which it appeared.
#
#For example:
#
#multiply_by_index([1, 2, 3, 4, 5]) -> [0, 2, 6, 12, 20]
#
#In the example above, the numbers 1, 2, 3, 4, and 5 appear
#at indices 0, 1, 2, 3, and 4. 1*0 = 0, 2 * 1 = 2, 3 * 2 = 6,
#and so on.

#Write your code here!

#Below are some lines of code that will test your function.
#You can change the value of the variable(s) to test your
#function with different inputs.
#
#If your function works correctly, this will originally
#print:
#[0, 2, 6, 12, 20]
#[0, 7, 14, 21, 28, 35, 42]
#[0, 7, 74, 195, 36, 0, 330]
print(multiply_by_index([1, 2, 3, 4, 5]))
print(multiply_by_index([7, 7, 7, 7, 7, 7, 7]))
print(multiply_by_index([14, 7, 37, 65, 9, 0, 55]))

2.

#Write a function called inside_search. inside_search should
#have two parameters: a list of strings and a string to search
#for. inside_search should return a list of all the indices at
#which the string in the list contains the search string. Note
#that the string at that index does not need to BE the search
#string, but rather must just contain it.
#
#For example:
#
#a_list = ["cat", "cats", "dog", "dogs", "catsup"]
#search_term = "cat"
#inside_search(a_list, search_term) -> [0, 1, 4]
#
#Note that the strings "cat", "cats", and "catsup" all contain
#the search string "cat", and thus the result is their indices:
#[0, 1, 4].
#
#Make sure the list you return is sorted from lowest index to
#highest.

#Add your code here!

#Below are some lines of code that will test your function.
#You can change the value of the variable(s) to test your
#function with different inputs.
#
#If your function works correctly, this will originally
#print:
#[0, 1, 4]
#[2, 3]
#[1, 4]
#[4]
#[]
cats_and_dogs_list = ["cat", "cats", "dog", "dogs", "catsup"]
print(inside_search(cats_and_dogs_list, "cat"))
print(inside_search(cats_and_dogs_list, "dog"))
print(inside_search(cats_and_dogs_list, "cats"))
print(inside_search(cats_and_dogs_list, "sup"))
print(inside_search(cats_and_dogs_list, "aardvark"))

Answer 1

# Write a function called multiply_by_index. multiply_by_index
# should have one parameter, a list; you may assume every item
# in the list will be an integer. multiply_by_index should
# return a list where each number in the original list is
# multipled by the index at which it appeared.
#
# For example:
#
# multiply_by_index([1, 2, 3, 4, 5]) -> [0, 2, 6, 12, 20]
#
# In the example above, the numbers 1, 2, 3, 4, and 5 appear
# at indices 0, 1, 2, 3, and 4. 1*0 = 0, 2 * 1 = 2, 3 * 2 = 6,
# and so on.


def multiply_by_index(lst):
    result = []
    for i in range(len(lst)):
        result.append(i * lst[i])
    return result


# Below are some lines of code that will test your function.
# You can change the value of the variable(s) to test your
# function with different inputs.
#
# If your function works correctly, this will originally
# print:
# [0, 2, 6, 12, 20]
# [0, 7, 14, 21, 28, 35, 42]
# [0, 7, 74, 195, 36, 0, 330]
print(multiply_by_index([1, 2, 3, 4, 5]))
print(multiply_by_index([7, 7, 7, 7, 7, 7, 7]))
print(multiply_by_index([14, 7, 37, 65, 9, 0, 55]))

# Write a function called inside_search. inside_search should
# have two parameters: a list of strings and a string to search
# for. inside_search should return a list of all the indices at
# which the string in the list contains the search string. Note
# that the string at that index does not need to BE the search
# string, but rather must just contain it.
#
# For example:
#
# a_list = ["cat", "cats", "dog", "dogs", "catsup"]
# search_term = "cat"
# inside_search(a_list, search_term) -> [0, 1, 4]
#
# Note that the strings "cat", "cats", and "catsup" all contain
# the search string "cat", and thus the result is their indices:
# [0, 1, 4].
#
# Make sure the list you return is sorted from lowest index to
# highest.

def inside_search(lst, search_term):
    result = []
    for i in range(len(lst)):
        if search_term in lst[i]:
            result.append(i)
    return result


# Below are some lines of code that will test your function.
# You can change the value of the variable(s) to test your
# function with different inputs.
#
# If your function works correctly, this will originally
# print:
# [0, 1, 4]
# [2, 3]
# [1, 4]
# [4]
# []
cats_and_dogs_list = ["cat", "cats", "dog", "dogs", "catsup"]
print(inside_search(cats_and_dogs_list, "cat"))
print(inside_search(cats_and_dogs_list, "dog"))
print(inside_search(cats_and_dogs_list, "cats"))
print(inside_search(cats_and_dogs_list, "sup"))
print(inside_search(cats_and_dogs_list, "aardvark"))