concatenate list items only if item is text

Question

I want to convert my string to a list and concatenate items only if the item is a text.

For example:

string = "123 text 4 text text text 800 text"

l = []
for i in string.split():
    if i[0].isalpha:
        l.append(i)

What I want

l = ["123", "text", "4", "text text text", "800", "text"]

What I have

l = ["123", "text", "4", "text", "text", "text", "800", "text"]

I want to concat all text items between numbers into one list item

Answer 1

import itertools as it    

string = "123 text 4 text text text 800 text"
l = [" ".join(group)
     for _, group in it.groupby(
         string.split(), key=lambda s: s[0].isalpha())]

Result:

>>> l
['123', 'text', '4', 'text text text', '800', 'text']