python) find all matches using regex (changed to re.findall from re.search)

Question

I am trying to extract all matches of numbers (nn.nn) next to a keyword (Exhibit). For example,

through April 25, 2012

through April 25, 2012 

Exhibit 99.6 

Exhibit 99.10

Here is my code.

import os,re
import numpy as np

os.chdir('C:\\Users\\dul\\Dropbox\\CTO\\test')


def extract_data(filename):
    with open(filename, 'r') as file1:
        text1=file1.read()

    matchexh = re.findall(r'Exhibit (\d+).(\d+)',text1)
    with open('outfile.txt', "a+") as outfile:
        outfile.write("\n"+matchexh)

files= os.listdir("C:\\Users\\dul\\Dropbox\\CTO\\test")
for file in files:
    if ".txt" in file:
        extract_data(file)

When I run this, I get an error message

File "C:\Users\dul\Dropbox\CTO\test\exhibitno.py", line 13, in extract_data  
   outfile.write("\n"+matchexh)  
TypeError: cannot concatenate 'str' and 'list' objects

How can I get all matches and list them?

You're looking for `re.findall()`. `re.search()` stops at the first match. — Jan, Mar 01 '19 at 16:15

score 1 · Accepted Answer · answered Mar 01 '19 at 16:20

1

Change this:

matchexh = re.search(r'Exhibit (\d+).(\d+)',text1).group().strip()

to:

matchexh = re.findall(r'Exhibit (\d+).(\d+)',text1)

answered Mar 01 '19 at 16:20

hacker315

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I thought the same thing, but the error **TypeError: cannot concatenate 'str' and 'list' objects** comes up... – Andre Mar 01 '19 at 16:27
@Andre Well... `matchexh` is a list, so you'll need to convert it to a string before doing `"\n" + matchexh`. (Maybe use a str.join?) – TrebledJ Mar 01 '19 at 16:28
add `" ".join(matchexh)` while writing to file. – hacker315 Mar 01 '19 at 16:32
Thanks guys! It works! – Andre Mar 01 '19 at 16:33
1

Please don't forget to mark this as correct answer! Thanks :) – hacker315 Mar 01 '19 at 16:34

python) find all matches using regex (changed to re.findall from re.search)

1 Answers1