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A python model for CloudFormation scripts

Project description


Build Status A python model for Cloud Formation scripts.

pycfmodel makes it easier to work with CloudFormation scripts in Python by creating a model comprised of python objects. Objects have various helper functions which help with performing common tasks related to parsing and inspecting CloudFormation scripts.

pip install pycfmodel

Currently Supported Models

  • parameters
  • resources
    • Generic Resource
    • IAM Group
    • IAM Managed Policy
    • IAM role
    • S3 Bucket Policy
    • Security Group Egress
    • Security Group Ingress
    • Security Group
    • SNS Topic Policy
    • SQS Queue Policy
  • properties
    • Policy Document
    • Policy
    • Principal
    • Security Group Egress Property
    • Security Group Ingress Property
    • Statement


import pycfmodel

template = {
  "Resources": {
    "S3Bucket" : {
      "Type" : "AWS::S3::Bucket",
      "Properties" : {
        "BucketName" : "fakebucketfakebucket"

    "S3BucketPolicyWithNotAction": {
      "Type": "AWS::S3::BucketPolicy",
      "Properties": {
        "Bucket": {
          "Ref": "S3Bucket"
        "PolicyDocument": {
          "Statement": [
              "Action": [
              "Effect": "Allow",
              "Resource": "arn:aws:s3:::fakebucketfakebucket/*",
              "Principal": {
                "AWS": "*"

parsed_cf = pycfmodel.parse(template)
for resource in parsed_cf.resources.get("AWS::S3::BucketPolicy", []):
    if resource.policy_document.wildcard_allowed_actions(pattern=r"^(\w*:){0,1}\*$"):

Local Development Commands

make install-dev
make coverage
make test
make freeze

Project details

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