正则表达式-如何解释数字之间没有空格

Question

I'm trying to scrape data from a pdf document that has lots of financial information. I'm a beginner at using regex but I was able to find the number I was specifically looking for which is in the hundreds of millions. However, there's no space between the end of that number and the start of the next number so I'm having a hard time not including the next number.

This is the result I'm getting:

['183,662,7203.004.00']

The number I want to scrape is 183,662,720, but as you can see, it's capturing the numbers afterwards since there is no space.

The code I'm using is re.findall('\(line 1 minus line 2\)(\d.+?)Less',y) . I'll be using this for other versions of this document where there may be numbers in the tens of thousands to billions. So that also complicates this a bit.

Any help would be much appreciated, thanks!

Answer 1

If you want to use the whole pattern, you might use:

\(line 1 minus line 2\)(\d{1,3}(?:,\d{3})*)\d*(?:\.\d+)* Less\b

The pattern matches:

• \(line 1 minus line 2\) Match (line 1 minus line 2)
• ( Capture group 1
  • \d{1,3}(?:,\d{3})* Match 1+ digits optionally repeated by a , and 3 digits
• ) Close group 1
• \d*(?:\.\d+)* Match optional digits, optionally followed by matching a . and digits
• Less\b Match Less followed by a word boundary to prevent a partial match

Regex demo | Python demo

For example

import re

y = r"This is (line 1 minus line 2)183,662,7203.004.00 Less test"
print(re.findall(r"\(line 1 minus line 2\)(\d{1,3}(?:,\d{3})*)\d*(?:\.\d+)* Less\b" ,y))

Output

['183,662,720']