CODEWITHSUNDEEP
python
justin
justin

Reputation: 1709

Python regular expression with raw string prefix

I'm new with python and regular expressions.

I have this regular expressions and i don't know what is the purpose of this

r'(\d+)\.(\d*)'

all I know is it matches a digit from 0 to 9.

can anyone help me explain it?

thanks..

Upvotes: 0

Views: 458

Answers (3)

Levon
Levon

Reputation: 143102

This looks for at least one digit (or more) followed by a decimal point and zero or more digits after it.

This quick reference/cheat sheet might be helpful looking up the parts that make up regular expressions.

This is a very nice Google video tutorial on regular expressions.

Upvotes: 1

Hugh Bothwell
Hugh Bothwell

Reputation: 56674

It matches a string containing one or more decimal digits, followed by a decimal place, followed by 0 or more decimal digits - ie, a floating-point number. It returns the two strings of digits.

For example, if you try it on the string "123.456" it will return ("123", "456").

Upvotes: 2

cobie
cobie

Reputation: 7271

http://docs.python.org/library/re.html read it up. It will definitely be more enlightening than any answer you get here. That though matches digits (1 or more) followed by a decimal point and some further numbers (0 or more)

Upvotes: 0

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