Practice Problems - Advanced Regular Expressions

Create a regex that finds dates in the format MM/DD/YY or MM/DD/YYYY and returns just the year part.

--blocks-- \d{2} / \d{2} / ( \d{2} | \d{4} )

Create a regex that finds phone numbers like 333-232-3403 or (333) 232 3403.

--blocks-- \(? \d{3} \)? [-\s] \d{3} [-\s] \d{4} (? )? (-|/s)

Create a regex that returns only the first alphabetic word (upper and lower case) at the start of the string.

--blocks-- ^ [a-zA-Z] + $ \w *

Replace ‘YOUR_REGEX’ below with a regex that matches any price in the form of $3.45 or $23.32 or $400.

def find_price(content):
    return re.findall('YOUR_REGEX', content)

--blocks-- \$\d+ (?:\.\d\d) ? (\.\d\d) *

Create a regex below that captures a URL that only consists of characters, numbers, underscore, and dots. For example: www.abc.com, def_ghi.com, a678.cn Note that dots(“.”) should not appear consecutively, and should not appear as the first or last character. The dot must appear at least once.

--blocks-- (?:\w+\.) + \w+ \. *

Construct a regex that captures words that start with a vowel (a, e, i, o, u), can have any number of characters from a-z after the vowel (including zero), and end with a consonant (any letters that are not a, e, i, o, u). For example, it should match “unicorn”, “it”, and “element”.

--blocks-- [aeiou] [a-z] * [^aeiou] + [!aeiou]

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