Python (re)

AWS ARN (Amazon Resource Name) in PY

Match AWS ARNs (Amazon Resource Names) across commercial, China, and GovCloud partitions.

Pattern

regexPY

arn:(?:aws|aws-cn|aws-us-gov):[a-z0-9\-]+:[a-z0-9\-]*:\d{12}?:[\w\-\/.*:]+   (flags: g)

Python (re) code

pyPython

import re

pattern = re.compile(r"arn:(?:aws|aws-cn|aws-us-gov):[a-z0-9\-]+:[a-z0-9\-]*:\d{12}?:[\w\-\/.*:]+")
input_text = "Bucket arn:aws:s3:::my-app-bucket/path"
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

arn:(?:aws|aws-cn|aws-us-gov): matches the ARN prefix and partition. [a-z0-9\-]+ matches the service (s3, lambda, iam, etc.). [a-z0-9\-]* matches the optional region (some services like IAM omit it). \d{12}? matches the 12-digit account ID (or omitted for some services). [\w\-\/.*:]+ matches the resource portion which varies wildly per service.

Examples

Input

Bucket arn:aws:s3:::my-app-bucket/path

Matches

arn:aws:s3:::my-app-bucket/path

Input

Lambda arn:aws:lambda:us-east-1:123456789012:function:hello

Matches

arn:aws:lambda:us-east-1:123456789012:function:hello

Input

no arns here

No match

—

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).

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