gnu: Add python-flake8-bugbear.

* gnu/packages/python-xyz.scm (python-flake8-bugbear): New variable.

Signed-off-by: Marius Bakke <marius@gnu.org>

gnu/packages/python-xyz.scm

@@ -7910,6 +7910,42 @@ complexity of Python source code.")
        ("python-pyflakes" ,python-pyflakes-1.2)
        ("python-mccabe" ,python-mccabe)))))
 
+(define-public python-flake8-bugbear
+  (package
+    (name "python-flake8-bugbear")
+    (version "20.1.4")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "flake8-bugbear" version))
+       (sha256
+        (base32
+         "0qiihb242fygzyrfynq913ak7cdmx8mcac9c0zk3y5gv16qf80mx"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:phases
+       (modify-phases %standard-phases
+         (add-before 'check 'disable-test
+           (lambda _
+             ;; This test fails on slow computers.
+             (substitute* "tests/test_bugbear.py"
+               (("def test_does_not_crash_on_any_valid_code")
+                "def _test_does_not_crash_on_any_valid_code")))))))
+    (native-inputs
+     `(("python-hypothesis" ,python-hypothesis)
+       ("python-hypothesmith" ,python-hypothesmith)))
+    (propagated-inputs
+     `(("python-attrs" ,python-attrs)
+       ("python-flake8" ,python-flake8)))
+    (home-page "https://github.com/PyCQA/flake8-bugbear")
+    (synopsis
+      "Flake8 plugin for finding likely bugs and design problems in your program")
+    (description
+     "This package contains a plugin for Flake8 finding likely bugs and
+design problems in your program.  It contains warnings that don't belong
+in pyflakes and pycodestyle.")
+    (license license:expat)))
+
 (define-public python-flake8-polyfill
   (package
     (name "python-flake8-polyfill")