🧆 update readme:

cdk/python/PostgreSQL_example/postgre_sql_example/postgre_sql_example_stack.py

@@ -0,0 +1,59 @@
+import json
+import sys
+from aws_cdk import (
+    aws_ec2 as ec2,
+    aws_rds as rds,
+    core as core,
+)
+
+# Python CDK does not have get_context yet.
+def _get_context():
+    CONTEXT_FILE = 'cdk.json'
+    try:
+        with open(CONTEXT_FILE, 'r') as f:
+            return json.load(f)['context']
+    except IOError:
+        print('Could not open context file {}. Exiting...'.format(CONTEXT_FILE))
+        sys.exit(1)
+    except KeyError as e:
+        print('Context file {0} is misconfigured {1}. Exiting...'.format(CONTEXT_FILE, e))
+        sys.exit(1)
+
+class PostgreSqlExampleStack(core.Stack):
+
+    def __init__(self, scope: core.Construct, id: str, **kwargs) -> None:
+        super().__init__(scope, id, **kwargs)
+
+        # Grab variables from cdk.json
+        context = _get_context()
+        auto_minor_version_upgrade =  context["rds.auto_minor_version_upgrade"]
+        availability_zone = context["rds.availability_zone"]
+        backup_retention = core.Duration.days(context["rds.backup_retention"])
+        database_name = context["rds.database_name"]
+        enable_performance_insights = context["rds.enable_performance_insights"]
+        master_username = context["rds.master_username"]
+        monitoring_interval = core.Duration.seconds(context["rds.monitoring_interval"])
+        multi_az = context["rds.multi_az"]
+        storage_encrypted = context["rds.storage_encrypted"]
+        cidr = context["vpc.cidr"]
+        max_azs = context["vpc.max_azs"]
+
+        # Set VPC
+        self.vpc = ec2.Vpc(self, "VPCTest", cidr=cidr, max_azs=max_azs)
+
+        # Database Instance
+        instance = rds.DatabaseInstance(self,
+            'storefrontrdspostgresdbinstance', 
+            master_username=master_username,
+            engine=rds.DatabaseInstanceEngine.POSTGRES, instance_class=ec2.InstanceType.of(ec2.InstanceClass.BURSTABLE2, ec2.InstanceSize.MICRO), 
+            vpc=self.vpc,
+            auto_minor_version_upgrade=auto_minor_version_upgrade,
+            availability_zone=availability_zone,
+            database_name=database_name,
+            enable_performance_insights=enable_performance_insights,
+            storage_encrypted=storage_encrypted,
+            multi_az=multi_az,
+            backup_retention=backup_retention,
+            monitoring_interval=monitoring_interval,
+         )
+