added option for write binary file modes

Author: HugoMario

modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/PythonClientCodegen.java

@@ -25,6 +25,8 @@ public class PythonClientCodegen extends DefaultCodegen implements CodegenConfig
     public static final String PACKAGE_URL = "packageUrl";
     public static final String DEFAULT_LIBRARY = "urllib3";
 
+    public static final String WRITE_BINARY_OPTION = "writeBinary";
+
     protected String packageName; // e.g. petstore_api
     protected String packageVersion;
     protected String projectName; // for setup.py, e.g. petstore-api
@@ -174,6 +176,11 @@ public void processOpts() {
             setPackageVersion("1.0.0");
         }
 
+        if (additionalProperties.containsKey(WRITE_BINARY_OPTION)) {
+            boolean optionValue = Boolean.parseBoolean(String.valueOf(additionalProperties.get(WRITE_BINARY_OPTION)));
+            additionalProperties.put(WRITE_BINARY_OPTION, optionValue);
+        }
+
         additionalProperties.put(CodegenConstants.PROJECT_NAME, projectName);
         additionalProperties.put(CodegenConstants.PACKAGE_NAME, packageName);
         additionalProperties.put(CodegenConstants.PACKAGE_VERSION, packageVersion);

modules/swagger-codegen/src/main/resources/python/api_client.mustache

@@ -540,7 +540,7 @@ class ApiClient(object):
                                  content_disposition).group(1)
             path = os.path.join(os.path.dirname(path), filename)
 
-        with open(path, "w") as f:
+        with open(path, {{^writeBinary}}"w"{{/writeBinary}}{{#writeBinary}}"wb"{{/writeBinary}}) as f:
             f.write(response.data)
 
         return path