Add example to pyopal.align docstring

pyopal/__init__.py

@@ -115,6 +115,14 @@ def align(
         ``score``, `EndResult` for mode ``end`` and `FullResult` for 
         mode ``full``.
 
+    Example:
+        >>> targets = ["AACCGCTG", "ATGCGCT", "TTATTACG"]
+        >>> for result in pyopal.align("ACCTG", targets, gap_open=2):
+        ...     print(result.score, targets[result.target_index])
+        41 AACCGCTG
+        31 ATGCGCT
+        23 TTATTACG
+
     """
     # derive default parameters
     if threads == 0:

pyopal/tests/test_doctest.py

@@ -14,11 +14,6 @@
 import warnings
 from unittest import mock
 
-try:
-    import numpy
-except ImportError:
-    numpy = None
-
 import pyopal
 
 
@@ -70,13 +65,25 @@ def tearDown(self):
     packages = [None, pyopal]
 
     for pkg in iter(packages.pop, None):
+        globs = dict(pyopal=pyopal, Bio=Bio, **pkg.__dict__)
+        tests.addTests(
+            doctest.DocTestSuite(
+                pkg,
+                globs=globs,
+                setUp=setUp,
+                tearDown=tearDown,
+                optionflags=+doctest.ELLIPSIS,
+            )
+        )
         for (_, subpkgname, subispkg) in pkgutil.walk_packages(pkg.__path__):
             # do not import __main__ module to avoid side effects!
             if subpkgname == "__main__" or subpkgname.startswith("tests"):
                 continue
             # import the submodule and add it to the tests
             module = importlib.import_module(".".join([pkg.__name__, subpkgname]))
-            globs = dict(pyopal=pyopal, numpy=numpy, Bio=Bio, **module.__dict__)
+            if hasattr(module, "__test__"):
+                del module.__test__
+            globs = dict(pyopal=pyopal, Bio=Bio, **module.__dict__)
             tests.addTests(
                 doctest.DocTestSuite(
                     module,