If sound card API not found, list options (#432)

LABSN · Nov 15, 2021 · dfbdf47 · dfbdf47
1 parent 5516e45
commit dfbdf47
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/expyfun/_sound_controllers/_rtmixer.py b/expyfun/_sound_controllers/_rtmixer.py
@@ -56,12 +56,16 @@ def _init_mixer(fs, n_channels, api, name, api_options=None):
  if len(devices) == 0:
  raise OSError('No sound devices found!')
  apis = sounddevice.query_hostapis()
+ valid_apis = []
  for ai, this_api in enumerate(apis):
  if this_api['name'] == api:
  api = this_api
  break
+ else:
+ valid_apis.append(this_api['name'])
  else:
- raise RuntimeError('Could not find host API %s' % (api,))
+ m = 'Could not find host API %s. Valid choices are "%s"'
+ raise RuntimeError(m % (api, ', '.join(valid_apis)))
  del this_api
 
  # Name