使用正则表达式拆分 Python 字符串

Question

We want to split a string multi line for example

|---------------------------------------------Title1(a)---------------------------------------------

Content goes here, the quick brown fox jumps over the lazy dog

|---------------------------------------------Title1(b)----------------------------------------------

Content goes here, the quick brown fox jumps over the lazy dog

here's our python split using regex code

import re

str1 = "|---------------------------------------------Title1(a)---------------------------------------------" \
    "" \
    "Content goes here, the quick brown fox jumps over the lazy dog" \
    "" \
    "|---------------------------------------------Title1(b)----------------------------------------------" \
    "" \
    "Content goes here, the quick brown fox jumps over the lazy dog" \
    "|"

print(str1)

str2 = re.split("\|---------------------------------------------", str1)


print(str2)

We want the output to include only

str2[0] :

Content goes here, the quick brown fox jumps over the lazy dog

str2[1] :

Content goes here, the quick brown fox jumps over the lazy dog

what's the proper regex to use, or is there any other way to split using the format above

Answer 1

Instead of using split, you can match the lines and capture the part that you want in a group.

\|-{2,}[^-]+-{2,}([^-].*?)(?=\|)

Explanation

• \\| Match |
• -{2,} Match 2 or more -
• [^-]+ Match 1+ times any char except -
• -{2,} Match 2 or more -
• ( Capture grou 1
  • [^-].*? match any char except - , then any char as least as possible
• ) Close group 1
• (?=\\|) Positive lookahead, assert a | to the right

Regex demo | Python demo

Example

import re
 
regex = r"\|-{2,}[^-]+-{2,}([^-].*?)(?=\|)"
 
str1 = "|---------------------------------------------Title1(a)---------------------------------------------" \
    "" \
    "Content goes here, the quick brown fox jumps over the lazy dog" \
    "" \
    "|---------------------------------------------Title1(b)----------------------------------------------" \
    "" \
    "Content goes here, the quick brown fox jumps over the lazy dog" \
    "|"
 
str2 = re.findall(regex, str1);
print(str2[0])
print(str2[1])

Output

Content goes here, the quick brown fox jumps over the lazy dog
Content goes here, the quick brown fox jumps over the lazy dog

---

If Title should be part of the line, another option is to make the match a bit more precise.

\|-+Title\d+\([a-z]\)-+(.+?)(?=\||$)

Regex demo