test: fix parser and redirect test case

README.md

@@ -1097,13 +1097,20 @@ with InfluxDBClient(url="http://localhost:8086",
 
 If your proxy notify the client with permanent redirect (`HTTP 301`) to **different host**. The client removes `Authorization` header, because otherwise the contents of `Authorization` is sent to third parties which is a security vulnerability.
 
-You can change this behaviour by:
+You can change this behavior by doing this in older urllib3 versions:
 
 ``` python
 from urllib3 import Retry
 Retry.DEFAULT_REMOVE_HEADERS_ON_REDIRECT = frozenset()
 Retry.DEFAULT.remove_headers_on_redirect = Retry.DEFAULT_REMOVE_HEADERS_ON_REDIRECT
 ```
+In the newer urllib3 versions, try to use this:
+
+``` python
+retries = Retry(redirect=1, remove_headers_on_redirect=[])
+self.influxdb_client = InfluxDBClient(url="http://localhost", token="my-token", org="my-org", retries=retries)
+```
+
 <!-- marker-proxy-end -->
 
 ### Delete data

influxdb_client/client/flux_csv_parser.py

@@ -251,6 +251,16 @@ def _prepare_data_frame(self):
 
         # We have to create temporary DataFrame because we want to preserve default column values
         _temp_df = pd.DataFrame(self._data_frame_values)
+        # This is for backward compatibles reason
+        # In newer Pandas versions 'string' type will be 'str', in older versions 'string' type will be 'object'
+        # In newer Pandas versions 'time' will be 'datetime64[us, UTC]', in older versions 'time'
+        # will be 'datetime64[ns, UTC]'
+        for column in _temp_df.columns:
+            if _temp_df[column].dtype.name == 'str':
+                _temp_df[column] = _temp_df[column].astype(object)
+            if _temp_df[column].dtype.name == 'datetime64[us, UTC]':
+                _temp_df[column] = _temp_df[column].astype('datetime64[ns, UTC]')
+
         self._data_frame_values = []
 
         # Custom DataFrame index

tests/test_WriteApi.py

@@ -532,7 +532,10 @@ def test_redirect(self):
         Retry.DEFAULT.remove_headers_on_redirect = Retry.DEFAULT_REMOVE_HEADERS_ON_REDIRECT
         self.influxdb_client.close()
 
-        self.influxdb_client = InfluxDBClient(url="http://localhost", token="my-token", org="my-org")
+        # In the newer urllib3 versions we need to set `redirect` and `remove_headers_on_redirect=[]` to
+        # make it re-direct POST requests and stop it from remove the `Authorization` header.
+        retries = Retry(redirect=1, remove_headers_on_redirect=[])
+        self.influxdb_client = InfluxDBClient(url="http://localhost", token="my-token", org="my-org", retries=retries)
 
         httpretty.register_uri(httpretty.POST, uri="http://localhost2/api/v2/write", status=204)
         httpretty.register_uri(httpretty.POST, uri="http://localhost/api/v2/write", status=301,