尝试在字符串之前和之后打印

Question

In python, I'm trying to extract 4 charterers before and after '©' symbol,this code extracts the characters after ©,can anyone help printing the characters before © (I don't want the entire string to get print,only few characters)

import re
    html = "This is all test and try things that's going on bro Copyright© Bro Code Bro"
    if "©" in html:
        symbol=re.findall(r"(?<=©).+$",html,re.M)
        print(symbol[0][0:100])

Answer 1

Here's a regex only solution to get the 4 characters before and after the ©

import re

text = "This is all test and try things that's going on bro Copyright© Bro Code Bro"

print(re.findall(".{4}©.{4}", text))

Output:

['ight© Bro']

Answer 2

html = "This is all test and try things that's going on bro Copyright© Bro Code Bro"
html = html.split("©")

print(html[0][-4:])
print(html[1][:4])

Output :

ight
 Bro

Answer 3

Try doing it this way :

if "©" in html:
    pos_c = html.find("©")
    symbol = html[pos_c-4:pos_c]
    print symbol

Answer 4

You are almost there!

Use search to get index and then slice/dice the string as you like

symbol=re.search(r"(?<=©).+$",html).start()

The above line give you the index of the match , in this case 63

Use

html[symbol:symbol+4] for post and html[symbol-4:symbol] for pre.

Answer 5

请使用python内置函数split（）来解决问题。

html = "This is all test and try things that's going on bro Copyright© Bro Code Bro" html = html.split('©')