Allow error messages without code field (#738)

alpaca_trade_api/rest.py

@@ -56,7 +56,7 @@ def __init__(self, error, http_error=None):
 
     @property
     def code(self):
-        return self._error['code']
+        return self._error.get('code', self.status_code)
 
     @property
     def status_code(self):
@@ -74,6 +74,15 @@ def response(self):
         if self._http_error is not None:
             return self._http_error.response
 
+def raise_api_error(resp: requests.Response, http_error: requests.HTTPError):
+    try:
+        error = resp.json()
+    except:
+        raise http_error from None
+    if 'message' in error:
+        raise APIError(error, http_error) from None
+    raise http_error from None
+
 
 class TimeFrameUnit(Enum):
     Minute = "Min"
@@ -236,12 +245,7 @@ def _one_request(self, method: str, url: URL, opts: dict, retry: int):
             # retry if we hit Rate Limit
             if resp.status_code in retry_codes and retry > 0:
                 raise RetryException()
-            if 'code' in resp.text:
-                error = resp.json()
-                if 'code' in error:
-                    raise APIError(error, http_error)
-            else:
-                raise
+            raise_api_error(resp, http_error)
         if resp.text != '':
             return resp.json()
         return None

requirements/requirements_test.txt

@@ -4,4 +4,4 @@ requests-mock
 coverage>=4.4.1
 mock>=1.0.1
 flake8
-deprecated
+deprecated