A RegEx, or Regular Expression, is a sequence of characters that forms a search pattern. RegEx can be used to check if a string contains the specified search pattern.
Where did the term Regular Expressions come from?
The term regular expression comes from mathematics and computer science theory, where it reflects a trait of mathematical expressions called regularity. The text patterns used by the earliest grep tools were regular expressions in the mathematical sense. They are often called REs, or regexes, or regex patterns.
Python has a built-in package called
re, which can be used to work with Regular Expressions.
Search the string to see if it starts with “The” and ends with “Spain”:
txt = “The rain in Spain”
x = re.search(“^The.*Spain$”, txt)
print(“YES! We have a match!”)
YES! We have a match!
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