Extract word from string Using python regex

Question

I want to extract a Model Number from string ,

/dev/sda:

ATA device, with non-removable media
    Model Number:       ST500DM002-1BD142                       
    Serial Number:      W2AQHKME
    Firmware Revision:  KC45    
    Transport:          Serial, SATA Rev 3.0

Regex I wrote,

re.search("Model Number:(\s+[\w+^\w|d]\n\t*)", str)

But issue is, its not matching any special characters (non ascii) in string str

Python 2.6

Note: String can be combination any characters/digits (including special)

Is this Python 2 or 3? What sample input can you give us that doesn't match? — Martijn Pieters
– Martijn Pieters, Commented Jul 22, 2014 at 10:45
@MartijnPieters I have posted the string above. Sorry I dont understand what you are asking for — Deepak Ingole
– Deepak Ingole, Commented Jul 22, 2014 at 10:48
Note that [\w+^\w|d] is not a grouping but a character class. You are matching one character that is a member of the set \w, +, ^, | or d. — Martijn Pieters
– Martijn Pieters, Commented Jul 22, 2014 at 10:53

Avinash Raj · Accepted Answer · 2014-07-22 11:02:45Z

6

Your regex would be,

Model Number:\s*([\w-]+)

Python code would be,

>>> import re
>>> s = """
... 
... /dev/sda:
... 
... ATA device, with non-removable media
...     Model Number:       ST500DM002-1BD142                       
...     Serial Number:      W2AQHKME
...     Firmware Revision:  KC45    
...     Transport:          Serial, SATA Rev 3.0"""
>>> m = re.search(r'Model Number:\s*([^\n]+)', s)
>>> m.group(1)
'ST500DM002-1BD142'

Explanation:

Model Number:\s* Matches the string Model Number: followed by zero or more spaces.
([^\n]+) Captures any character but not of a newline character one or more times.

edited Jul 22, 2014 at 11:02

answered Jul 22, 2014 at 10:48

Avinash Raj

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5 Comments

Deepak Ingole Over a year ago

It fails in case of word separated with spaces Model Number: Virtual Box

hjpotter92 Over a year ago

@Pilot use [-\s\w]+ in that case.

Deepak Ingole Over a year ago

@hjpotter92 Results 'Model Number: ST500DM002-1BD142 \n\tSerial Number'

Avinash Raj Over a year ago

@Pilot use Model Number:\s*([^\n]+)

Avinash Raj Over a year ago

sure. May i add that to my answer.

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