gnu: Add python-flake8-debugger.

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

gnu/packages/python-xyz.scm

@@ -10322,6 +10322,29 @@ These should be used in preference to using a backslash for line continuation.
 @end quotation")
     (license license:asl2.0)))
 
+(define-public python-flake8-debugger
+  (package
+    (name "python-flake8-debugger")
+    (version "4.1.2")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "flake8-debugger" version))
+       (sha256
+        (base32 "0h1qlzbxxhjsw6kg3mcml9h8byy77m9a5z06z2dnvqs115b05c2j"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:tests? #f))              ; no tests in PyPI and no setup.py in GitHub
+    (propagated-inputs
+     (list python-flake8 python-pycodestyle))
+    (home-page "https://github.com/jbkahn/flake8-debugger")
+    (synopsis "@code{ipdb} and @code{pdb} statement checker plugin for flake8")
+    (description "This package provides a Flake8 plugin that checks for
+@code{ipdb} and @code{pdb} imports and set traces, as well as
+@code{from IPython.terminal.embed}, @code{import InteractiveShellEmbed}
+and @code{InteractiveShellEmbed()()}.")
+    (license license:expat)))
+
 (define-public python-flake8-implicit-str-concat
   (package
     (name "python-flake8-implicit-str-concat")