fix: replace deprecated method calls

Author: alespour

influxdb_client/client/exceptions.py

@@ -15,7 +15,7 @@ def __init__(self, response: HTTPResponse = None, message: str = None):
         if response is not None:
             self.response = response
             self.message = self._get_message(response)
-            self.retry_after = response.getheader('Retry-After')
+            self.retry_after = response.headers.get('Retry-After')
         else:
             self.response = None
             self.message = message or 'no response'
@@ -34,7 +34,7 @@ def _get_message(self, response):
 
         # Header
         for header_key in ["X-Platform-Error-Code", "X-Influx-Error", "X-InfluxDb-Error"]:
-            header_value = response.getheader(header_key)
+            header_value = response.headers.get(header_key)
             if header_value is not None:
                 return header_value
 

influxdb_client/rest.py

@@ -34,7 +34,7 @@ def __init__(self, status=None, reason=None, http_resp=None):
             self.status = http_resp.status
             self.reason = http_resp.reason
             self.body = http_resp.data
-            self.headers = http_resp.getheaders()
+            self.headers = http_resp.headers
         else:
             self.status = status
             self.reason = reason