fix(rosetta): use of keyword 'lambda' produces invalid Python code

packages/jsii-rosetta/lib/languages/python.ts

@@ -179,7 +179,6 @@ export class PythonVisitor extends DefaultVisitor<PythonLanguageContext> {
     const originalIdentifier = node.text;
 
     const explodedParameter = context.currentContext.explodedParameter;
-    // eslint-disable-next-line max-len
     if (
       context.currentContext.tailPositionArgument &&
       explodedParameter &&
@@ -815,10 +814,11 @@ function mangleIdentifier(originalIdentifier: string) {
     return originalIdentifier;
   }
   // Turn into snake-case
-  return originalIdentifier.replace(
+  const cased = originalIdentifier.replace(
     /[^A-Z][A-Z]/g,
     (m) => `${m[0].substr(0, 1)}_${m.substr(1).toLowerCase()}`,
   );
+  return IDENTIFIER_KEYWORDS.includes(cased) ? `${cased}_` : cased;
 }
 
 const BUILTIN_FUNCTIONS: { [key: string]: string } = {
@@ -833,6 +833,8 @@ const TOKEN_REWRITES: { [key: string]: string } = {
   false: 'False',
 };
 
+const IDENTIFIER_KEYWORDS: string[] = ['lambda'];
+
 function last<A>(xs: readonly A[]): A {
   return xs[xs.length - 1];
 }

packages/jsii-rosetta/test/translations/identifiers/keyword.cs

@@ -0,0 +1,4 @@
+using Scope.Aws.Lambda;
+new ClassFromLambda(new Struct {
+    Key = "lambda.amazonaws.com"
+});

packages/jsii-rosetta/test/translations/identifiers/keyword.java

@@ -0,0 +1,4 @@
+import scope.aws.lambda.*;
+ClassFromLambda.Builder.create()
+        .key("lambda.amazonaws.com")
+        .build();

packages/jsii-rosetta/test/translations/identifiers/keyword.py

@@ -0,0 +1,4 @@
+import scope.aws_lambda as lambda_
+lambda_.ClassFromLambda(
+    key="lambda.amazonaws.com"
+)

packages/jsii-rosetta/test/translations/identifiers/keyword.ts

@@ -0,0 +1,4 @@
+import * as lambda from '@scope/aws-lambda';
+new lambda.ClassFromLambda({
+  key: 'lambda.amazonaws.com'
+});