Import the random module

from random import *

'''
The program should pick an entry at random from all glossary entries.
The function show_flashcard() randomly chooses a key or value from the glossary dictionary and prints it.
Next the program will display the definition of the entry from the glossary, if the key was displayed first;
Or the corresponding entry, if the definition was displayed first.
'''

Function to show the flashcard

def show_flashcard():
"""
The show_flashcard function prints a random key from the glossary dictionary.
If the key starts with 'd', it will print the corresponding word entry for that definition.
Otherwise, it will just print out the definition of that word.

:return: The random key from the glossary list
:doc-author: Trelent
"""
# Get a random key from the glossary list
random_key = choice(list(glossary) + list(glossary.values()))
# print the key from the dictionary
print(random_key)  # print the key from the dictionary
if random_key.startswith("d"):
    input('Press return to show the corresponding word entry for the definition')
    index = list(glossary.values()).index(random_key)  # index of the word definition
    print(list(glossary)[index])  # prints  the word definition list    for the definition index
else:  # prints  the word definition  
    input('Press return to see the definition')
    # Print the definition of the word
    print(glossary[random_key])

Set up the glossary ( dictionary name = {keys:values} )

glossary = {'word1': 'definition1',
'word2': 'definition2',
'word3': 'definition3'}

The interactive loop

exit = False
while not exit:
user_input = input('Enter s to show a flashcard and q to quit: ')
if user_input == 'q':
exit = True
elif user_input == 's':
show_flashcard()
else:
print('You need to enter either q or s.')