UK Postcode in PY
Match UK postcodes in the common outward + inward format (e.g. SW1A 1AA, EC1V 9LB).
Try it in the PY tester →Pattern
regexPY
[A-Z]{1,2}\d[A-Z\d]? ?\d[A-Z]{2} (flags: gi)Python (re) code
pyPython
import re
pattern = re.compile(r"[A-Z]{1,2}\d[A-Z\d]? ?\d[A-Z]{2}", re.IGNORECASE)
input_text = "SW1A 1AA"
for m in pattern.finditer(input_text):
print(m.group(0))Stdlib `re` module — no third-party dependency. Works on Python 3.6+.
How the pattern works
1–2 letters, 1 digit, optional letter/digit, optional space, 1 digit, 2 letters. Case-insensitive flag handles lower and mixed case input.
Examples
Input
SW1A 1AAMatches
SW1A 1AA
Input
EC1V 9LBMatches
EC1V 9LB
Input
B33 8THMatches
B33 8TH