[codegen][python-experimental] Add configuration knob to disable JSON schema validation (#6227)

* Add knob to disable JSON schema structural validation

* Add knob to disable JSON schema structural validation

* Fix formatting issues

* execute sample scripts

* execute sample scripts

* fix multipleOf validation issue

* Add validation log for multipleOf. Add customizable validation checks. add unit tests for JSON schema validation

* Add validation log for multipleOf. Add customizable validation checks. add unit tests for JSON schema validation

* Add validation log for multipleOf. Add customizable validation checks. add unit tests for JSON schema validation

* Add validation log for multipleOf. Add customizable validation checks. add unit tests for JSON schema validation. Fix for python 2

* address review comments

samples/client/petstore/python/petstore_api/configuration.py

@@ -20,8 +20,15 @@ import urllib3
 
 import six
 from six.moves import http_client as httplib
+from petstore_api.exceptions import ApiValueError
 
 
+JSON_SCHEMA_VALIDATION_KEYWORDS = {
+    'multipleOf', 'maximum', 'exclusiveMaximum',
+    'minimum', 'exclusiveMinimum', 'maxLength',
+    'minLength', 'pattern', 'maxItems', 'minItems'
+}
+
 class Configuration(object):
     """NOTE: This class is auto generated by OpenAPI Generator
 
@@ -49,6 +56,19 @@ class Configuration(object):
       then all undeclared properties received by the server are injected into the
       additional properties map. In that case, there are undeclared properties, and
       nothing to discard.
+    :param disabled_client_side_validations (string): Comma-separated list of
+      JSON schema validation keywords to disable JSON schema structural validation
+      rules. The following keywords may be specified: multipleOf, maximum,
+      exclusiveMaximum, minimum, exclusiveMinimum, maxLength, minLength, pattern,
+      maxItems, minItems.
+      By default, the validation is performed for data generated locally by the client
+      and data received from the server, independent of any validation performed by
+      the server side. If the input data does not satisfy the JSON schema validation
+      rules specified in the OpenAPI document, an exception is raised.
+      If disabled_client_side_validations is set, structural validation is
+      disabled. This can be useful to troubleshoot data validation problem, such as
+      when the OpenAPI document validation rules do not match the actual API data
+      received by the server.
 
     :Example:
 
@@ -94,6 +114,7 @@ conf = petstore_api.Configuration(
                  api_key=None, api_key_prefix=None,
                  username=None, password=None,
                  discard_unknown_keys=False,
+                 disabled_client_side_validations="",
                  ):
         """Constructor
         """
@@ -124,6 +145,7 @@ conf = petstore_api.Configuration(
         """Password for HTTP basic authentication
         """
         self.discard_unknown_keys = discard_unknown_keys
+        self.disabled_client_side_validations = disabled_client_side_validations
         self.access_token = None
         """access token for OAuth/Bearer
         """
@@ -205,6 +227,13 @@ conf = petstore_api.Configuration(
 
     def __setattr__(self, name, value):
         object.__setattr__(self, name, value)
+        if name == 'disabled_client_side_validations':
+            s = set(filter(None, value.split(',')))
+            for v in s:
+                if v not in JSON_SCHEMA_VALIDATION_KEYWORDS:
+                    raise ApiValueError(
+                        "Invalid keyword: '{0}''".format(v))
+            self._disabled_client_side_validations = s
 
     @classmethod
     def set_default(cls, default):