Fix: refactor to adapt to changes to shapely dependency (#1376)

* fix: refactored to account for changes in dependency

* Removes comment and ensures linting success

* refactor to use loads() function

* fix: refactors to account for changes to shapely dependency

* fix: refactors to account for changes to shapely dependency

* blacken the code

* add mypy ignore flag for shapely import

google/cloud/bigquery/_pandas_helpers.py

@@ -57,15 +57,9 @@
     if pandas is not None:  # pragma: NO COVER
 
         def _to_wkb():
-            # Create a closure that:
-            # - Adds a not-null check. This allows the returned function to
-            #   be used directly with apply, unlike `shapely.wkb.dumps`.
-            # - Avoid extra work done by `shapely.wkb.dumps` that we don't need.
-            # - Caches the WKBWriter (and write method lookup :) )
-            # - Avoids adding WKBWriter, lgeos, and notnull to the module namespace.
-            from shapely.geos import WKBWriter, lgeos  # type: ignore
-
-            write = WKBWriter(lgeos).write
+            from shapely import wkb  # type: ignore
+
+            write = wkb.dumps
             notnull = pandas.notnull
 
             def _to_wkb(v):

google/cloud/bigquery/table.py

@@ -39,11 +39,11 @@
     _COORDINATE_REFERENCE_SYSTEM = "EPSG:4326"
 
 try:
-    import shapely.geos  # type: ignore
+    import shapely  # type: ignore
 except ImportError:
     shapely = None
 else:
-    _read_wkt = shapely.geos.WKTReader(shapely.geos.lgeos).read
+    _read_wkt = shapely.wkt.loads
 
 import google.api_core.exceptions
 from google.api_core.page_iterator import HTTPIterator