Merge branch 'master' of github.com:typpo/quickchart-python

Author: typpo

README.md

@@ -7,7 +7,7 @@ A Python client for the [quickchart.io](https://quickchart.io/) image charts web
 
 # Installation
 
-Use the `quickchart.py` library in this project, or install through [pip](https://pypi.org/project/quickchart.io/):
+Use the `quickchart` library in this project, or install through [pip](https://pypi.org/project/quickchart.io/):
 
 ```
 pip install quickchart.io

quickchart/__init__.py

@@ -96,16 +96,20 @@ def _post(self, url):
         }
         resp = requests.post(url, json=postdata, headers=headers)
         if resp.status_code != 200:
+            err_description = resp.headers.get('x-quickchart-error')
             raise RuntimeError(
-                'Invalid response code from chart creation endpoint')
+                'Invalid response code from chart creation endpoint: %d%s'
+                % (resp.status_code, '\n%s' % err_description if err_description else '')
+            )
         return resp
 
+
     def get_short_url(self):
         resp = self._post('%s/chart/create' % self.get_url_base())
         parsed = json.loads(resp.text)
         if not parsed['success']:
             raise RuntimeError(
-                'Failure response status from chart creation endpoint')
+                'Chart creation endpoint failed to create chart')
         return parsed['url']
 
     def get_bytes(self):