fix enum in python flask (#16576)

Author: wing328

bin/configs/python-flask.yaml

@@ -1,4 +1,4 @@
 generatorName: python-flask
 outputDir: samples/server/petstore/python-flask
-inputSpec: modules/openapi-generator/src/test/resources/2_0/petstore.yaml
+inputSpec: modules/openapi-generator/src/test/resources/2_0/python-flask/petstore.yaml
 templateDir: modules/openapi-generator/src/main/resources/python-flask

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractPythonCodegen.java

@@ -1981,4 +1981,17 @@ public String toEnumValue(String value, String datatype) {
     public String toEnumDefaultValue(String value, String datatype) {
         return value;
     }
+
+    /**
+     * checks if the data should be classified as "string" in enum
+     * e.g. double in C# needs to be double-quoted (e.g. "2.8") by treating it as a string
+     * In the future, we may rename this function to "isEnumString"
+     *
+     * @param dataType data type
+     * @return true if it's a enum string
+     */
+    @Override
+    public boolean isDataTypeString(String dataType) {
+        return "str".equals(dataType);
+    }
 }

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractPythonConnexionServerCodegen.java

@@ -16,17 +16,9 @@
 
 package org.openapitools.codegen.languages;
 
-import static org.openapitools.codegen.utils.StringUtils.camelize;
-
 import java.io.File;
 import java.io.IOException;
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
+import java.util.*;
 
 import org.apache.commons.lang3.StringUtils;
 import org.openapitools.codegen.CliOption;
@@ -69,6 +61,8 @@
 import io.swagger.v3.oas.models.parameters.RequestBody;
 import io.swagger.v3.oas.models.security.SecurityScheme;
 
+import static org.openapitools.codegen.utils.StringUtils.*;
+
 public abstract class AbstractPythonConnexionServerCodegen extends AbstractPythonCodegen implements CodegenConfig {
     private static class PythonBooleanSerializer extends JsonSerializer<Boolean> {
         @Override
@@ -178,7 +172,7 @@ public AbstractPythonConnexionServerCodegen(String templateDirectory, boolean fi
         cliOptions.add(new CliOption(USE_PYTHON_SRC_ROOT_IN_IMPORTS, "include pythonSrcRoot in import namespaces.").
                 defaultValue("false"));
         cliOptions.add(new CliOption(MOVE_TESTS_UNDER_PYTHON_SRC_ROOT, "generates test under the pythonSrcRoot folder.")
-            .defaultValue("false"));
+                .defaultValue("false"));
     }
 
     protected void addSupportingFiles() {
@@ -333,7 +327,6 @@ public String toApiName(String name) {
     }
 
 
-
     @Override
     public String toApiTestFilename(String name) {
         return "test_" + toApiFilename(name);
@@ -636,12 +629,6 @@ public void postProcessModelProperty(CodegenModel model, CodegenProperty propert
         postProcessPattern(property.pattern, property.vendorExtensions);
     }
 
-    @Override
-    public ModelsMap postProcessModels(ModelsMap objs) {
-        // process enum in models
-        return postProcessModelsEnum(objs);
-    }
-
     @Override
     public Map<String, ModelsMap> postProcessAllModels(Map<String, ModelsMap> objs) {
         Map<String, ModelsMap> result = super.postProcessAllModels(objs);

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/PythonClientCodegen.java

@@ -464,20 +464,6 @@ protected void addAdditionPropertiesToCodeGenModel(CodegenModel codegenModel, Sc
         }
     }
 
-
-    /**
-     * checks if the data should be classified as "string" in enum
-     * e.g. double in C# needs to be double-quoted (e.g. "2.8") by treating it as a string
-     * In the future, we may rename this function to "isEnumString"
-     *
-     * @param dataType data type
-     * @return true if it's a enum string
-     */
-    @Override
-    public boolean isDataTypeString(String dataType) {
-        return "str".equals(dataType);
-    }
-
     @Override
     public String escapeReservedWord(String name) {
         if (this.reservedWordsMappings().containsKey(name)) {

modules/openapi-generator/src/main/resources/python-flask/model.mustache

@@ -29,7 +29,7 @@ class {{classname}}(Model):
     allowed enum values
     """
 {{#enumVars}}
-    {{name}} = {{{value}}}{{^-last}}
+    {{{name}}} = {{{value}}}{{^-last}}
 {{/-last}}
 {{/enumVars}}
 {{/allowableValues}}