CODEWITHSUNDEEP
python
dharpatel
dharpatel

Reputation: 467

Issue with split function

I have a list variable name:

name = ['Ny-site-1-145237890-service']

I want to split this list in a way so I can get name = ['Ny-site-1']. To do this I am using the below code:

import re
name = ['Ny-site-1-145237890-service']
site_name = re.split('(-[0-9]-service)')[0]

But the above code is not give me the output I am looking for. How do I get the desired result?

Upvotes: 0

Views: 57

Answers (2)

alecxe
alecxe

Reputation: 473803

First of all, re.split() requires 2 arguments, you are providing a single one.

Also, you need to add + quantifier (means "1 or more") for the [0-9] set of characters:

>>> import re
>>>
>>> name = ['Ny-site-1-145237890-service']
>>> re.split(r'-[0-9]+-service', name[0])[0]
'Ny-site-1'

I would also add the maxsplit=1 argument to avoid unnecessary splits:

>>> re.split(r'-[0-9]+-service', name[0], maxsplit=1)[0]
'Ny-site-1'

You may also add an end of a string check to make the expression more reliable:

-[0-9]+-service$

And, you can also solve it with re.sub():

>>> re.sub(r'-[0-9]+-service$', '', name[0])
'Ny-site-1'

Upvotes: 2

intboolstring
intboolstring

Reputation: 7100

Try adding a + in your regex to match multiple numbers.

name = 'Ny-site-1-145237890-service'
site_name = re.split('(-[0-9]+-service)', name)[0]

If you want to use an array to store your name(s), you can use

name = ['Ny-site-1-145237890-service']
site_name = re.split('(-[0-9]+-service)', name[0])[0]

If you have multiple names and you want to print them all, you can use 

for i in names:
    print(re.split('(-[0-9]+-service)', i)[0])

Upvotes: 0

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