E.T. Problem

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Here's a quote from E.T. the Extra-Terrestrial.

quote = "coke. you see, we drink it. it's a, it's a drink. you know, food?"

Capitalize the first letter of each sentence using a single call to re.sub().

Expected result

newquote = "Coke. You see, we drink it. It's a, it's a drink. You know, food?"

Regex Functions

Function	Description	Return Value
re.findall(pattern, string, flags=0)	Find all non-overlapping occurrences of pattern in string	list of strings, or list of tuples if > 1 capture group
re.finditer(pattern, string, flags=0)	Find all non-overlapping occurrences of pattern in string	iterator yielding match objects
re.search(pattern, string, flags=0)	Find first occurrence of pattern in string	match object or None
re.split(pattern, string, maxsplit=0, flags=0)	Split string by occurrences of pattern	list of strings
re.sub(pattern, repl, string, count=0, flags=0)	Replace pattern with repl	new string with the replacement(s)

Regex Patterns

Pattern	Description
[abc]	a or b or c
[^abc]	not (a or b or c)
[a-z]	a or b ... or y or z
[1-9]	1 or 2 ... or 8 or 9
\d	digits [0-9]
\D	non-digits [^0-9]
\s	whitespace [ \t\n\r\f\v]
\S	non-whitespace [^ \t\n\r\f\v]
\w	alphanumeric [a-zA-Z0-9_]
\W	non-alphanumeric [^a-zA-Z0-9_]
.	any character
x*	zero or more repetitions of x
x+	one or more repetitions of x
x?	zero or one repetitions of x
{m}	m repetitions
{m,n}	m to n repetitions
{m,n}	m to n repetitions
\\, \., \*	backslash, period, asterisk
\b	word boundary
^hello	starts with hello
bye$	ends with bye
(...)	capture group
(po|go)	po or go

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