>>> sentence = """You said "why?" and I say "I don't know".""" >>> re.findall(r'"(.*)"', sentence) ['why?" and I say "I don\'t know']
>>> re.findall('hi*', 'hiiiii')
['hiiiii']
>>> re.findall('hi{2,}', 'hiiiii')
['hiiiii']
>>> re.findall('hi{1,3}', 'hiiiii')
['hiii']
>>> re.findall('hi*?', 'hiiiii')
['h']
>>> re.findall('hi{2,}?', 'hiiiii')
['hii']
>>> re.findall('hi{1,3}?', 'hiiiii')
['hi']
>>> sentence = """You said "why?" and I say "I don't know".""" >>> re.findall(r'"(.*?)"', sentence) ['why?', "I don't know"]
>>> sentence = "Oh what a day, what a lovely day!" >>> re.findall(r'\b(\w+)\b.*\b\1\b', sentence) ['what']
>>> re.findall(r'\b(\w+)\b(?=.*\b\1\b)', sentence) ['what', 'a', 'day']
>>> re.search(r'([a-z]).*(?!\1)[a-z]', 'aa', re.IGNORECASE) >>> re.search(r'([a-z]).*(?!\1)[a-z]', 'ab', re.IGNORECASE) <_sre.SRE_Match object; span=(0, 2), match='ab'>
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