How to match two character classes in 1 regex in python?

Question

the list of strings I want to iterate through look like this
{"text":Foo bar\01d"},
out of which I want to extract Foo bar. I tried

f = open ("file.json", "r")
for line in f.readlines():
  #for left side
  leftSide = re.compile(r'([^{"text":].*)')
  mo = leftSide.findall(line)

for line in f.readlines():
  #rightside
  rightSide = re.compile(r'.*[\\01d"}$]')
  mo2 = rightSide.findall(line)

I have also unsuccessfully tried this answer. Is it possible to match both in one regex or extract the data in one piece?

Do not use regular expressions for json parsing. There's json module, use it. json.load(f) — Olvin Roght
– Olvin Roght, Commented May 11, 2021 at 12:36
okay, but i also have the txt version of the files, will use them — ayu_j
– ayu_j, Commented May 11, 2021 at 12:38

Synthaze · Accepted Answer · 2021-05-11 12:45:17Z

1

Why not using:

import re

f = open ("file.json", "r")

for l in f.readlines():

    print (re.split(r'"text":|\x01d',l)[1])

With:

l = '{"text":Foo bar\01d"},'

print (re.split(r'"text":|\x01d',l)[1])

Output:

Foo bar

Here we use a regex split, which uses left and right side delimiters, and take index 1.

answered May 11, 2021 at 12:45

Synthaze

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4 Comments

Olvin Roght Over a year ago

You should not parse json using regular expressions.

Synthaze Over a year ago

I know. But see OP's comment in his original post.

Olvin Roght Over a year ago

I don't understand meaning of those comment, txt version of json file is a text file with json formatted data, imho.

Synthaze Over a year ago

Same here. Sometimes peoples need to make their own understanding ;).

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