Fix spanner creds issues: fixes: #634, #644 (#646)

* fix: credential_file logic when not defined

* fix: spanner_cofig get logic and error when not defined

* chore: update to v0.35.10 in CHANGELOG.md w/ comments

Author: DataBoyTX

CHANGELOG.md

@@ -7,6 +7,12 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 
 ## [Development]
 
+## [0.35.10 - 2025-01-24]
+
+### Fixes: 
+
+* Spanner: better handling of spanner_config issues: #634, #644
+
 ## [0.35.9 - 2025-01-22]
 
 ### Docs 

graphistry/PlotterBase.py

@@ -2530,13 +2530,14 @@ def spanner_gql_to_g(self: Plottable, query: str) -> Plottable:
         res = copy.copy(self)
 
         if not hasattr(res, '_spannergraph'):
-            spanner_config = PyGraphistry._config["spanner"]
+            spanner_config = PyGraphistry._config.get("spanner", None)
+
             if spanner_config is not None: 
                 logger.debug(f"Spanner Config: {spanner_config}")
             else: 
-                raise ValueError('spanner_config is None, use spanner_init() or register() passing spanner_config')
+                raise ValueError('spanner_config not defined. Pass spanner_config via register() and retry query.')
 
-            res = res.spanner_init(PyGraphistry._config["spanner"])  # type: ignore[attr-defined]
+            res = res.spanner_init(spanner_config)  # type: ignore[attr-defined]
 
         return res._spannergraph.gql_to_graph(res, query)
 

graphistry/plugins/spannergraph.py

@@ -82,7 +82,8 @@ def __connect(self) -> Any:
         from google.cloud.spanner_dbapi.connection import connect
 
         try:
-            if self.credentials_file: 
+            if hasattr(self, 'credentials_file') and self.credentials_file is not None:
+                
                 connection = connect(self.instance_id, self.database_id, credentials=self.credentials_file)
             else:
                 connection = connect(self.instance_id, self.database_id)