Python (re)

Canadian Postal Code in PY

Match Canadian postal codes in the A1A 1A1 or A1A1A1 format with valid first-letter prefixes.

Try it in the PY tester →

Pattern

regexPY
[ABCEGHJ-NPRSTVXY]\d[A-Z] ?\d[A-Z]\d   (flags: gi)

Python (re) code

pyPython
import re

pattern = re.compile(r"[ABCEGHJ-NPRSTVXY]\d[A-Z] ?\d[A-Z]\d", re.IGNORECASE)
input_text = "K1A 0B1"
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

The leading character is constrained to letters actually used by Canada Post (D, F, I, O, Q, U, W, Z are excluded). Alternating letter-digit pattern, with an optional space separator.

Examples

Input

K1A 0B1

Matches

  • K1A 0B1

Input

M5V3L9

Matches

  • M5V3L9

Input

12345

No match

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Same pattern, other engines

JavaScript / ECMAScript

Supported

See how this pattern looks (and behaves) in JavaScript's built-in RegExp.

Go (RE2)

Supported

See how this pattern looks (and behaves) in Go's `regexp` package (RE2 engine).

← Back to Canadian Postal Code overview (all engines)