Use numbers types when checking arguments (#419)

## Description

<!-- Provide a brief description of the PR's purpose here. -->

Previously, we were using `isinstance(x, (int, np.integer))`; however,
we can be more general and succinct by using `isinstance(x,
numbers.Integral)` (the `numbers` module is part of the standard
library).

## TODO

<!-- Notable points that this PR has either accomplished or will
accomplish. -->

## Questions

<!-- Any concerns or points of confusion? -->

## Status

- [x] I have read the guidelines in

[CONTRIBUTING.md](https://github.com/icaros-usc/pyribs/blob/master/CONTRIBUTING.md)
- [x] I have formatted my code using `yapf`
- [x] I have tested my code by running `pytest`
- [x] I have linted my code with `pylint`
- [x] I have added a one-line description of my change to the changelog
in
      `HISTORY.md`
- [x] This PR is ready to go

HISTORY.md

@@ -24,6 +24,7 @@
 
 #### Improvements
 
+- Use numbers types when checking arguments ({pr}`419`)
 - Reimplement ArchiveBase using ArrayStore ({pr}`399`)
 - Use chunk computation in CVT brute force calculation to reduce memory usage
   ({pr}`394`)

ribs/archives/_array_store.py

@@ -1,5 +1,6 @@
 """Provides ArrayStore."""
 import itertools
+import numbers
 from enum import IntEnum
 from functools import cached_property
 
@@ -125,7 +126,7 @@ def __init__(self, field_desc, capacity):
                 raise ValueError(
                     f"Field names must be valid identifiers: `{name}`")
 
-            if isinstance(field_shape, (int, np.integer)):
+            if isinstance(field_shape, numbers.Integral):
                 field_shape = (field_shape,)
 
             array_shape = (capacity,) + tuple(field_shape)

ribs/emitters/_evolution_strategy_emitter.py

@@ -1,4 +1,6 @@
 """Provides the EvolutionStrategyEmitter."""
+import numbers
+
 import numpy as np
 
 from ribs._utils import check_1d_shape, validate_batch_args
@@ -173,7 +175,7 @@ def _check_restart(self, num_parents):
         Raises:
           ValueError: If :attr:`restart_rule` is invalid.
         """
-        if isinstance(self._restart_rule, (int, np.integer)):
+        if isinstance(self._restart_rule, numbers.Integral):
             return self._itrs % self._restart_rule == 0
         if self._restart_rule == "no_improvement":
             return num_parents == 0

ribs/emitters/_gradient_arborescence_emitter.py

@@ -1,4 +1,6 @@
 """Provides the GradientArborescenceEmitter."""
+import numbers
+
 import numpy as np
 
 from ribs._utils import check_1d_shape, validate_batch_args
@@ -301,7 +303,7 @@ def _check_restart(self, num_parents):
         Raises:
           ValueError: If :attr:`restart_rule` is invalid.
         """
-        if isinstance(self._restart_rule, (int, np.integer)):
+        if isinstance(self._restart_rule, numbers.Integral):
             return self._itrs % self._restart_rule == 0
         if self._restart_rule == "no_improvement":
             return num_parents == 0

ribs/emitters/_gradient_operator_emitter.py

@@ -1,4 +1,5 @@
 """Provides the GradientOperatorEmitter."""
+import numbers
 
 import numpy as np
 
@@ -140,7 +141,7 @@ def __init__(self,
 
         self._rng = np.random.default_rng(seed)
         self._sigma = archive.dtype(sigma) if isinstance(
-            sigma, (float, np.floating)) else np.array(sigma)
+            sigma, numbers.Real) else np.array(sigma)
         self._sigma_g = archive.dtype(sigma_g)
         self._line_sigma = line_sigma
         self._use_isolinedd = operator_type != 'isotropic'