match anchors at the start. fullmatch wants the whole string. search looks anywhere.

Goal

Print how the three functions treat the same kiosk line.

import re
line = "Nairobi 12"
print("match", re.match(r"Nairobi", line))
print("search", re.search(r"12", line))
print("fullmatch", re.fullmatch(r"Nairobi 12", line))

import re
line = "kiosk Nairobi"
print("match 12", re.match(r"12", line))
print("search 12", re.search(r"12", line))

import re
print(bool(re.fullmatch(r"07\d{8}", "0712345678")))
print(bool(re.fullmatch(r"07\d{8}", "0712-345-678")))

import re
pat = r"\d+"
line = "units 12 price 10.5"
print(re.match(pat, line))
print(re.search(pat, line).group())