Proper Error Handling Missing at client initialization

[sonivi]

https://github.com/hpe-storage/python-3parclient/blob/master/hpe3parclient/client.py#L201-L204
try: api_version = self.getWsApiVersion() except exceptions as ex: ex_desc = ex.get_description()

error at "self.getWsApiVersion()" results in

11:23:49 E   requests.exceptions.ProxyError: HTTPSConnectionPool(host='192.168.67.2', port=8080): Max retries exceeded with url: /api (Caused by ProxyError('Cannot connect to proxy.', OSError('Tunnel connection failed: 503 Service Unavailable',)))
11:23:49 
11:23:49 During handling of the above exception, another exception occurred:
11:23:49 hpe_3par_api_manage_test.py:48: in <module>
11:23:49     hpe_3par_cli = HPE3ParClient(HPE3PAR_API_URL, True, False, None, True)
11:23:49 /usr/lib/python3.6/site-packages/hpe3parclient/client.py:203: in __init__
11:23:49     except exceptions as ex:
11:23:49 E   TypeError: catching classes that do not inherit from BaseException is not allowed
11:23:49 ------------------------------- Captured stderr --------------------------------
11:23:49 
11:23:49 REQ: curl -i https://192.168.67.2:8080/api -X GET -H "User-Agent: python-3parclient" -H "Accept: application/json"
11:23:49