# Tutorial_1_Problem_4.py
#
# Problem Statement: Write a complete Python program that figures out how many upper case letters
# appear in a sentence. For the purpose of this program, we define a sentence to be a sequence of
# two or more words separated by one blank space (or white space) character and a word to be a
# sequence of one or more letters.
# 
# Here are four sample runs:
# • If the sentence is "ThE SKy Is BluE.", our program prints "ThE SKy Is BluE. contains 7 upper case letter(s)." on the computer monitor screen.
# • If the sentence is "YeLlOw bAnAnA", our program prints "YeLlOw bAnAnA contains 6 upper case letter(s)." on the computer monitor screen.
# • If the sentence is "" (i.e., an empty string), our program prints "This is not a sentence." on the computer monitor screen.
# • If the sentence is "baNana", our program prints "This is not a sentence." on the computer monitor screen.
#
# Note: You can assume that the user is “well-behaved”, i.e., s/he will enter only the three categories of test data mentioned in the four sample runs above, namely a valid sentence (sample runs 1. and 2.), an empty sentence (a sentence containing no words – sample run 3.) and a sentence containing one word (sample run 4.).
#
#If you find it useful to start by designing an algorithm, feel free to do so.
#
# Anne Lavergne
# 2016

# Remember the number of upper case letters 
countCap = 0

# Get a sentence from user
sentence = input("""Please, enter a sentence containing 2 or more words
separated by one blank space (or white space) character
(a word is 1 or more letters) : """)

# Checking for empty sentence and sentence with 1 word, i.e., sentence that does not contain the " " char.
if len(sentence) == 0 or not " " in sentence:
    print("This is not a sentence.")
else:
  # Figure out how many upper case letters appear in a sentence
  for char in sentence:
    if char.isupper():
        countCap += 1
  # Report
  print("{0} contains {1} upper case letter(s).".format(sentence, countCap))