Program that checks for capitalisation and full stop

Question

I am a beginner programmer. I am trying to write a program that will ask for a sentence, then check for 2 things. 1) A capital letter at the start of the sentence and 2) a full stop at its end. I also want it to print out a sentence that'll tell the user whether or not their sentence is correct. For example:

Enter a sentence: python is hard.

Your sentence doesn't begin with a capital letter.

and

Enter a sentence: Python is hard

Your sentence has no full stop at the end.

and

Enter a sentence: python is hard

Your sentence doesn't start with a capital letter and has no full stop at the end.

and lastly;

Enter a sentence: Python is hard.

Your sentence is perfect.

However, i am stuck and all i have is this mess:

sentence = input("Sentence: ")
if sentence[0].isupper():
  print("")
if (sentence[0].isupper()) != sentence:
  print("Your sentence does not start with a capital letter.")
elif "." not in sentence:
  print("Your sentence does not end with a full stop.")
else:
  print("Your sentence is correctly formatted.")

Any help would be greatly appreciated.

Answer 1

Try this:

sentence = input('Sentence: ') # You should use raw_input if it is python 2.7
if not sentence[0].isupper() and sentence[-1] != '.': # You can check the last character using sentence[-1]
    # both the conditions are not satisfied
    print 'Your sentence does not start with a capital letter and has no full stop at the end.'
elif not sentence[0].isupper():
    # sentence does not start with a capital letter
    print 'Your sentence does not start with a capital letter.'
elif sentence[-1] != '.':
    # sentence does not end with a full stop
    print 'Your sentence does not end with a full stop.'
else:
    # sentence is perfect
    print 'Your sentence is perfect.'