How to do the program will terminate if your user input's first letter of a word is not capital-CodePudding

How do I make this program accepts only a user input that's been typed while following a proper capitalization. Like it won't accept "robin hood" unless it's "Robin Hood". When I run it, it says...

Traceback (most recent call last):
  File "C:\Users\AMD-Ryzen\Documents\PY CODEX\3.1.py", line 20, in <module>
    if x.isupper() == false:
AttributeError: 'list' object has no attribute 'isupper'

Here's my code:

#List of the movies
lst = ['Spidey', 'Castaway', 'Avengers', 'GI. JOE', 'Shallow']

#The data stored in this list will come from input("Name of movie") using .append
x=[]

print("Enter at least 5 of your favorite movies" "\n")

#Loop to repeat the same question 5 times
for i in range(5):                  
    x.append(input("Name of movie:"))

#I used the set.intersection method to find the common elements between the two list
lst_as_set = set(lst)
intersection = lst_as_set.intersection(x)
intersection_as_lst = list(intersection)



if x.isupper() == false:
    print("It will never work out. Nice meeting you!")


elif len(intersection_as_lst) == 3:
    Ques = input("\n" "Do you love some of his movies?:")
    if Ques == "yes":
        print("\n" "You have", len(intersection_as_lst), "common fave movies and they are:")
        print(intersection_as_lst)
    elif Ques == "no":
        print("It will never work out. I dont like")
        s = set(x) - set(lst)
        print(s)

elif len(intersection_as_lst) == 0:
    Ques = input("Do you love some of his movies?:")
    if Ques == "yes":
        print("It will never work out. Nice meeting you!")
    else:
        print("It will never work out. Nice meeting you!")

CodePudding user response：

The error occurs because you are trying to apply a string method isupper() to a list. You must use a loop with the parameter:

for c in x:
    if not c[0].isupper():
        print("It will never work out. Nice meeting you!")
        break

CodePudding user response：

First in python it is False and not false. and as you want to stop the program you can raise an exception

x = list()
print("Enter at least 5 of your favorite movies\n")
for i in range(5):
    m_name = input("Name of movie: ")
    if m_name[0].islower():
        raise 'must start with an uppercase letter'
    x.append(m_name)

CodePudding user response：

You are checking if list is isupper . You'll need to do

output = []
for word in x:
    if word[0].isupper() == False:
        output.append(word)
        print("It will never work out. Nice meeting you!")

CodePudding user response：

def ìs_properly_capitalized(word: str) -> bool:
    if not word:
        return False
    return word[0].isupper() and not any([c.isupper() for c in word[1:]])


results = [ìs_properly_capitalized(word) for word in lst]

if False in results:
    print("One or more words not properly capitalized")
    sys.exit(1)