fix pyspark check registration (#2087)

Signed-off-by: cosmicBboy <[email protected]>

Author: cosmicBboy

pandera/__init__.py

@@ -36,8 +36,11 @@
 except ImportError as err:
     import warnings
 
-    if "pandas" in str(err) or "numpy" in str(err):
+    err_msg = str(err)
+    if err_msg in {"No module named 'pandas'", "No module named 'numpy'"}:
         warnings.warn(_warning_msg, UserWarning)
+    elif err_msg.startswith("pandera requires pandas >= 2.1.1"):
+        warnings.warn(err_msg, UserWarning)
     else:
         raise  # Re-raise any other `ImportError` exceptions
 

pandera/_pandas_deprecated.py

@@ -22,13 +22,17 @@
 if parse(pd.__version__) < _min_pandas_version:
     raise ImportError(
         "pandera requires pandas >= 2.1.1, but you have pandas "
-        f"{pd.__version__}. Please upgrade pandas to the minimum supported version."
+        f"{pd.__version__}. Using the pandera.pandas module may not work as "
+        "expected. It's highly recommended to upgrade pandas to the minimum "
+        "supported version."
     )
 
 if parse(np.__version__) < _min_numpy_version:
     raise ImportError(
         "pandera requires numpy >= 1.24.4, but you have numpy "
-        f"{np.__version__}. Please upgrade numpy to the minimum supported version."
+        f"{np.__version__}. Using the pandera.pandas module may not work as "
+        "expected. It's highly recommended to upgrade numpy to the minimum "
+        "supported version."
     )
 
 from pandera._patch_numpy2 import _patch_numpy2

pandera/pyspark.py

@@ -5,6 +5,8 @@
 
 _patch_numpy2()
 
+import pandera.backends.base.builtin_checks
+import pandera.backends.base.builtin_hypotheses
 import pandera.backends.pyspark
 from pandera import errors, external_config
 from pandera.accessors import pyspark_sql_accessor