Merge 1ed4e69 into b970847

CHANGELOG.md

@@ -4,6 +4,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+### Added
+- added backwards compatibility for class `InvalidUsage` exception in
+  experiment_errors.py, for custom.py files generated by old version of psiturk.
+
 ## 3.0.5
 ### Fixed
 - Fixed backwards compatibility for translating ON_HEROKU=1 to ON_CLOUD=1
@@ -44,6 +49,8 @@ thought through.
   call `render_template()` on it yourself.
 - psiturk.js `preloadPages()` now returns a `Promise`. See the [migration guide](https://psiturk.readthedocs.io/en/latest/migrating.html) for links to
   examples of using the new approach.
+- psiturk exception `InvalidUsage` changed to `InvalidUsageError`. Breaks
+  `custom.py` files generated under psiturk v2.
 
 #### Configuration files
 - the configuration file created by running `psiturk-setup-example`

psiturk/experiment_errors.py

@@ -154,7 +154,7 @@ def error_page(self, request, contact_on_error):
 
 
 class ExperimentApiError(Exception):
-    
+
     def __init__(self, message, status_code=500, payload=None):
         super().__init__()
         self.message = message
@@ -168,8 +168,13 @@ def to_dict(self):
 
 
 class InvalidUsageError(ExperimentApiError):
-    
+
     def __init__(self, *args, **kwargs):
         if 'status_code' not in kwargs:
             kwargs['status_code'] = 400
         super(InvalidUsageError, self).__init__(*args, **kwargs)
+
+class InvalidUsage(InvalidUsageError):
+    # backwards compatibility with psiturk v2's custom.py files
+    # generated by psiturk-setup-example
+    pass