Python re.findall() Capitalized Words including Apostrophes

Question

I'm having trouble completing the a regex tutorial that went \w+ references words to this problem with "Find all capitalized words in my_string and print the result" where some of the words have apostrophes.

Original String:

In [1]: my_string
Out[1]: "Let's write RegEx!  Won't that be fun?  I sure think so.  Can you 
find 4 sentences?  Or perhaps, all 19 words?"

Current Attempt:

# Import the regex module
import re
# Find all capitalized words in my_string and print the result
capitalized_words = r"((?:[A-Z][a-z]+ ?)+)"
print(re.findall(capitalized_words, my_string))

Current Result:

['Let', 'RegEx', 'Won', 'Can ', 'Or ']

What I think the desired outcome is:

['Let's', 'RegEx', 'Won't', 'Can't', 'Or']

How do you go from r"((?:[A-Z][a-z]+ ?)+)" to also selecting the 's and 't at the end of Let's, Won't and Can't when not everything were trying to catch is expected to have an apostrophe?

Answer 1

Just add an apostrophe to the second bracket group:

capitalized_words = r"((?:[A-Z][a-z']+)+)"