从字符串获取特定信息

Question

I have the same problem like this guy:

partition string in python and get value of last segment after colon

Mine is like:

IP-Adress: 1.1.1.1 Device: Fritzbox Serialnumber: 123456789

I want to only get the Device so my Output should look like: "Fritzbox" i dont need anything else.

result = mystring.rpartition(':')[2]

is this possible with this kinda code? If yes what do i have to change to cut the rest off?

Answer 1

You can use re.split here and use the result to create a dictionary - that way you can access any keys you want, eg:

import re

text = 'IP-Adress: 1.1.1.1 Device: Fritzbox Serialnumber: 123456789 Description: something or other here test: 5'
split = re.split(r'\s*(\S+):\s+', text)
data = dict(zip(split[1::2], split[2::2]))

This gives you a data of:

{'IP-Adress': '1.1.1.1',
 'Device': 'Fritzbox',
 'Serialnumber': '123456789',
 'Description': 'something or other here',
 'test': '5'}

Then access that as you want, eg:

device = data.get('Device', '***No Device Found???***')

This way you get access to all key/value pairs should you ever want them, it doesn't rely on any ordering of keys nor their actual presence in your text.

Answer 2

Assuming 'Device:' is always present, the following Regular expression should work for you:

s = 'IP-Adress: 1.1.1.1 Device: Fritzbox Serialnumber: 123456789'

import re
re.search(r'Device:\s*(\w+)', s).group(1)
# 'Fritzbox'

---

Or if you prefer string methods, you could do something like:

s.split(':')[-2].strip().split()[0]
# 'Fritzbox'

Answer 3

Assuming Device: and Serialnumber are always present:

s = 'IP-Adress: 1.1.1.1 Device: Fritzbox Serialnumber: 123456789'

def GetInBetween(s, st, ed):
  return (s.split(st))[1].split(ed)[0]

print(GetInBetween(s, 'Device:', 'Serialnumber').strip())

OUTPUT :

Fritzbox

EDIT :

If you have a list of those strings:

sList = ['IP-Adress: 1.2.2.2 Device: Fritzbox Serialnumber: 123456789',
        'IP-Adress: 1.3.4.3 Device: Macin Serialnumber: 123456789',
        'IP-Adress: 1.123.12.11 Device: IBM Serialnumber: 123456789',
         ]

for elem in sList:
    print(GetInbetween(elem, 'Device:', 'Serialnumber').strip())

OR

Using list comprehension :

print([GetInbetween(x, 'Device:', 'Serialnumber').strip() for x in sList])

OUTPUT :

['Fritzbox', 'Macin', 'IBM']

Answer 4

using pygrok python package we can extract data from the string in a structured format.

A Python library to parse strings and extract information from structured/unstructured data.

https://pypi.org/project/pygrok/

pip install pygrok

from pygrok import Grok
text = 'IP-Adress: 1.1.1.1 Device: Fritzbox Serialnumber: 123456789'
pattern = 'IP-Adress: 1.1.1.1 Device: %{WORD:device} Serialnumber: 123456789'
grok = Grok(pattern)
print (grok)
#output
{
  "device": [
   ["Fritzbox"]
]
}