MAINT: Python <3.7 related cleanups

Author: bsipocz

INSTALL.rst.txt

@@ -14,7 +14,7 @@ Prerequisites
 
 Building NumPy requires the following installed software:
 
-1) Python__ 3.7.x or newer.
+1) Python__ 3.8.x or newer.
 
    Please note that the Python development headers also need to be installed,
    e.g., on Debian/Ubuntu one needs to install both `python3` and

doc/HOWTO_RELEASE.rst.txt

@@ -153,7 +153,7 @@ What is released
 
 Wheels
 ------
-We currently support Python 3.6-3.8 on Windows, OSX, and Linux
+We currently support Python 3.8-3.10 on Windows, OSX, and Linux
 
 * Windows: 32-bit and 64-bit wheels built using Appveyor;
 * OSX: x64_86 OSX wheels built using travis-ci;

doc/source/user/basics.rec.rst

@@ -146,16 +146,14 @@ summary they are:
 
 4.   A dictionary of field names
 
-     The use of this form of specification is discouraged, but documented here
-     because older numpy code may use it. The keys of the dictionary are the
-     field names and the values are tuples specifying type and offset::
+     The keys of the dictionary are the field names and the values are tuples
+     specifying type and offset::
 
       >>> np.dtype({'col1': ('i1', 0), 'col2': ('f4', 1)})
       dtype([('col1', 'i1'), ('col2', '<f4')])
 
-     This form is discouraged because Python dictionaries do not preserve order
-     in Python versions before Python 3.6, and the order of the fields in a
-     structured dtype has meaning. :ref:`Field Titles <titles>` may be
+     This form was discouraged because Python dictionaries did not preserve order
+     in Python versions before Python 3.6. :ref:`Field Titles <titles>` may be
      specified by using a 3-tuple, see below.
 
 Manipulating and Displaying Structured Datatypes

numpy/core/tests/test_deprecations.py

@@ -613,9 +613,6 @@ def test_non_exact_match(self):
 
 class TestDeprecatedGlobals(_DeprecationTestCase):
     # 2020-06-06
-    @pytest.mark.skipif(
-        sys.version_info < (3, 7),
-        reason='module-level __getattr__ not supported')
     def test_type_aliases(self):
         # from builtins
         self.assert_deprecated(lambda: np.bool(True))

numpy/core/tests/test_multiarray.py

@@ -4135,13 +4135,6 @@ class TestPickling:
     def test_correct_protocol5_error_message(self):
         array = np.arange(10)
 
-        if sys.version_info[:2] in ((3, 6), (3, 7)):
-            # For the specific case of python3.6 and 3.7, raise a clear import
-            # error about the pickle5 backport when trying to use protocol=5
-            # without the pickle5 package
-            with pytest.raises(ImportError):
-                array.__reduce_ex__(5)
-
     def test_record_array_with_object_dtype(self):
         my_object = object()
 
@@ -8569,10 +8562,9 @@ def __bool__(self):
 
         self_containing = np.array([None])
         self_containing[0] = self_containing
-        try:
-            Error = RecursionError
-        except NameError:
-            Error = RuntimeError  # python < 3.5
+
+        Error = RecursionError
+
         assert_raises(Error, bool, self_containing)  # previously stack overflow
         self_containing[0] = None  # resolve circular reference
 

numpy/core/tests/test_regression.py

@@ -17,12 +17,6 @@
 from numpy.testing._private.utils import _no_tracing, requires_memory
 from numpy.compat import asbytes, asunicode, pickle
 
-try:
-    RecursionError
-except NameError:
-    RecursionError = RuntimeError  # python < 3.5
-
-
 
 class TestRegression:
     def test_invalid_round(self):

numpy/distutils/misc_util.py

@@ -694,8 +694,7 @@ def get_shared_lib_extension(is_python_ext=False):
     -----
     For Python shared libs, `so_ext` will typically be '.so' on Linux and OS X,
     and '.pyd' on Windows.  For Python >= 3.2 `so_ext` has a tag prepended on
-    POSIX systems according to PEP 3149.  For Python 3.2 this is implemented on
-    Linux, but not on OS X.
+    POSIX systems according to PEP 3149.
 
     """
     confvars = distutils.sysconfig.get_config_vars()

numpy/f2py/__init__.py

@@ -169,24 +169,19 @@ def get_include():
     return os.path.join(os.path.dirname(__file__), 'src')
 
 
-if sys.version_info[:2] >= (3, 7):
-    # module level getattr is only supported in 3.7 onwards
-    # https://www.python.org/dev/peps/pep-0562/
-    def __getattr__(attr):
-
-        # Avoid importing things that aren't needed for building
-        # which might import the main numpy module
-        if attr == "test":
-            from numpy._pytesttester import PytestTester
-            test = PytestTester(__name__)
-            return test
+def __getattr__(attr):
 
-        else:
-            raise AttributeError("module {!r} has no attribute "
-                                 "{!r}".format(__name__, attr))
+    # Avoid importing things that aren't needed for building
+    # which might import the main numpy module
+    if attr == "test":
+        from numpy._pytesttester import PytestTester
+        test = PytestTester(__name__)
+        return test
+
+    else:
+        raise AttributeError("module {!r} has no attribute "
+                              "{!r}".format(__name__, attr))
 
-    def __dir__():
-        return list(globals().keys() | {"test"})
 
-else:
-    raise NotImplementedError("F2PY needs Python 3.7")
+def __dir__():
+    return list(globals().keys() | {"test"})

numpy/lib/tests/test_financial_expired.py

@@ -3,8 +3,6 @@
 import numpy as np
 
 
-@pytest.mark.skipif(sys.version_info[:2] < (3, 7),
-                    reason="requires python 3.7 or higher")
 def test_financial_expired():
     match = 'NEP 32'
     with pytest.warns(DeprecationWarning, match=match):

numpy/testing/tests/test_utils.py

@@ -1243,13 +1243,6 @@ def assert_warn_len_equal(mod, n_in_context, py37=None):
         # do not count it.
         num_warns -= 1
 
-        # Behavior of warnings is Python version dependent. Adjust the
-        # expected result to compensate. In particular, Python 3.7 does
-        # not make an entry for ignored warnings.
-        if sys.version_info[:2] >= (3, 7):
-            if py37 is not None:
-                n_in_context = py37
-
     assert_equal(num_warns, n_in_context)
 
 def test_warn_len_equal_call_scenarios():