Removes pandas older than 1.5 and misc changes

Author: chalmerlowe

db_dtypes/__init__.py

@@ -21,14 +21,14 @@
 import warnings
 
 import numpy
-import packaging.version
 import pandas
 import pandas.api.extensions
 from pandas.errors import OutOfBoundsDatetime
 import pyarrow
 import pyarrow.compute
 
 from db_dtypes import core
+from db_dtypes.json import JSONArray, JSONArrowType, JSONDtype
 from db_dtypes.version import __version__
 
 from . import _versions_helpers
@@ -46,7 +46,6 @@
 # nanosecond precision when boxing scalars.
 _NP_BOX_DTYPE = "datetime64[us]"
 
-from db_dtypes.json import JSONArray, JSONArrowType, JSONDtype
 
 @pandas.api.extensions.register_extension_dtype
 class TimeDtype(core.BaseDatetimeDtype):
@@ -342,15 +341,14 @@ def __sub__(self, other):
 sys_major, sys_minor, sys_micro = _versions_helpers.extract_runtime_version()
 if sys_major == 3 and sys_minor in (7, 8):
     warnings.warn(
-        "The python-bigquery library will stop supporting Python 3.7 "
-        "and Python 3.8 in a future major release expected in Q4 2024. "
+        "The python-bigquery library as well as the python-db-dtypes-pandas library no "
+        "longer supports Python 3.7 and Python 3.8. "
         f"Your Python version is {sys_major}.{sys_minor}.{sys_micro}. We "
         "recommend that you update soon to ensure ongoing support. For "
         "more details, see: [Google Cloud Client Libraries Supported Python Versions policy](https://cloud.google.com/python/docs/supported-python-versions)",
-        PendingDeprecationWarning,
+        FutureWarning,
     )
 
-
 if not JSONArray or not JSONDtype:
     __all__ = [
         "__version__",

db_dtypes/core.py

@@ -186,7 +186,6 @@ def median(
         keepdims: bool = False,
         skipna: bool = True,
     ):
-
         pandas_backports.numpy_validate_median(
             (),
             {"out": out, "overwrite_input": overwrite_input, "keepdims": keepdims},

samples/snippets/requirements-test.txt

@@ -1,2 +1 @@
-pytest===7.4.4; python_version == '3.7'  # prevents dependabot from upgrading it
-pytest==8.3.3; python_version > '3.7'
+pytest==8.3.5

scripts/readme-gen/templates/install_deps.tmpl.rst

@@ -12,7 +12,7 @@ Install Dependencies
    .. _Python Development Environment Setup Guide:
        https://cloud.google.com/python/setup
 
-#. Create a virtualenv. Samples are compatible with Python 3.7+.
+#. Create a virtualenv. Samples are compatible with Python >= 3.9.
 
     .. code-block:: bash
 

tests/unit/test_dtypes.py

@@ -14,7 +14,6 @@
 
 import datetime
 
-import packaging.version
 import pytest
 
 pd = pytest.importorskip("pandas")
@@ -536,7 +535,7 @@ def test_min_max_median(dtype):
         a = cls(data)
         assert a.min() == sample_values[0]
         assert a.max() == sample_values[-1]
-        
+
         assert (
             a.median() == datetime.time(1, 2, 4)
             if dtype == "dbtime"