Question

Write a function show_value() that takes two arguments:

1. a potential key and
2. a dictionary name.

If the potential key is in the dictionary, the function should return the value for that key. If the potential key, say invalid_key, is not in the dictionary, it should return the string:

invalid_key is not a valid key.

Answer 1

# do comment if any problem arises

# Code

# this function returns value of a given key in dictionary if it is valid

def show_value(given_key, dictionary):

# iterate over all keys and values

for key, value in dictionary.items():

# if current key is the given key to search then return its value

if key == given_key:

return value

# if key not found in dictionary return key is not valid

return f"{given_key} is not a valid key."

# testing above function

dictionary = {'1': 'Mango', '2': 'Apple', 'r': 'Blue Berry'}

print(f'Value of key r in dictionary is: {show_value("r", dictionary)}')

print(f'Value of key m in dictionary is: {show_value("m", dictionary)}')

Screenshot for indentation:

Output: