How to extract a certain text from a string using Python

Question

Consider I have a string in the format

sampleapp-ABCD-1234-us-eg-123456789. I need to extract the text ABCD-1234. Its more like I need ABCD and then the numbers before the -

Please let me know how can i do that

• wanderors: Can you please help @ManojKumar
• Manoj Kumar: If the number characters is fixed, then you can use string slicing.
• wanderors: No...it can vary @ManojKumar

Answer 1

You could use string.split(), so it would be:

string = 'sampleapp-ABCD-1234-us-eg-123456789'
example = string.split('-')

Then you can access 'abcd' and '1234' as example[1] and example[2] respectively. You can also join them back together into one string if needs be with string.join().

string = 'sampleapp-ABCD-1234-us-eg-123456789'
example = string.split('-')
newstring = ' '.join(example[1:3])
print (newstring)

You can also change the seperator, '-'.join would make it so the output is 'ABCD-1234' rather than 'ABCD 1234'.

• Manoj Kumar: I think should solve your problem.
• wanderors: can we get using regex ?
• James: You could, but if the text you need is always going to be in the same position there's honestly no point.
• wanderors: can we make like the text ABCD and the the number before the next -, like that format ?
• James: Do you mean so it's one string? Like 'ABCD-1234'? I'll add it to the answer above.

Answer 2

You can use Regex (Regular expression) Here's the Python script you can use:

import re
txt = "sampleapp-ABCD-1234-us-eg-123456789"
x = re.findall("([ABCD]+[-][0-9]+)", txt)
print(x)

More varied version:

x = re.findall("([A-Z]{4}[-][0-9]+)", txt)

For more info about Regex you can learn it here: regexr.com

Hope this helps. Cheer!

• wanderors: It didnt work..
• Teerapad Pipadboonyarat: Can you show me the output? I want to know why it didn't work.
• wanderors: It printed as []
• Teerapad Pipadboonyarat: Can I see the code?
• wanderors: x = re.findall("([GEST]+[-][0-9]+)", STRING) print("XXXXXXX") print(x) String provided was JustTrial-GEST-1234-ty-eg-123456789

Answer 3

You can do that :

txt = "sampleapp-ABCD-1234-us-eg-123456789"
abcd = txt[10:14]
digits = txt[15:19]
print(abcd)
print(digits)

You can also use split the text using txt.split("-") and then you can extract what you want :

abcd = txt.split("-")[1]
digits = txt.split("-")[2]

Answer 4

Please keep this post as an enquiry if it doesn't answer your question.

If what your are saying is that the string is of the form a-B-X0-c-d-X1 and that you want to extract B-X0 from the string then you can do the following:

text = 'a-B-X0-c-d-X1'
extracted_val = '-'.join(text.split('-')[1:3])

• joel n: if you were asking something else ,let me know