gnu: python-pytest: Update to 3.5.0.

* gnu/packages/python.scm (python-six): Replace system* with invoke.
(python-six-bootstrap, python2-six-bootstrap, python2-funcsigs-bootstrap): New
variables.
(python-more-itertools)[propagated-inputs]: Replace python-six with
python-six-bootstrap.
* gnu/packages/check.scm (python-pytest): Update to 3.5.0.
[propagated-inputs]: Add python-attrs-bootstrap,
python-more-itertools-bootstrap, python-pluggy and python-six-bootstrap.
[properties]: Add python2-variant.
(python2-pytest)[propagated-inputs]: Add python2-funcsigs.
(python-pytest-bootstrap)[properties]: Add python2-variant.
(python2-pytest-bootstrap)[propagated-inputs]: Add python2-funcsigs-bootstrap.

gnu/packages/check.scm

@@ -597,14 +597,14 @@ standard library.")
 (define-public python-pytest
   (package
     (name "python-pytest")
-    (version "3.2.3")
+    (version "3.5.0")
     (source
      (origin
        (method url-fetch)
        (uri (pypi-uri "pytest" version))
        (sha256
         (base32
-         "0g6w86ks73fnrnsyib9ii2rbyx830vn7aglsjqz9v1n2xwbndyi7"))))
+         "1q832zd07zak2lyxbycxjydh0jp7y3hvawjqzlvra6aghz8r3r7s"))))
     (build-system python-build-system)
     (arguments
      `(#:phases
@@ -622,7 +622,11 @@ standard library.")
                                line)))
              #t)))))
     (propagated-inputs
-     `(("python-py" ,python-py)))
+     `(("python-attrs" ,python-attrs-bootstrap)
+       ("python-more-itertools" ,python-more-itertools)
+       ("python-pluggy" ,python-pluggy)
+       ("python-py" ,python-py)
+       ("python-six" ,python-six-bootstrap)))
     (native-inputs
      `(;; Tests need the "regular" bash since 'bash-final' lacks `compgen`.
        ("bash" ,bash)
@@ -636,20 +640,33 @@ standard library.")
      "Pytest is a testing tool that provides auto-discovery of test modules
 and functions, detailed info on failing assert statements, modular fixtures,
 and many external plugins.")
-    (license license:expat)))
+    (license license:expat)
+    (properties `((python2-variant . ,(delay python2-pytest))))))
 
 (define-public python2-pytest
-  (package-with-python2 python-pytest))
+  (let ((pytest (package-with-python2
+                 (strip-python2-variant python-pytest))))
+    (package
+      (inherit pytest)
+      (propagated-inputs
+       `(("python2-funcsigs" ,python2-funcsigs)
+         ,@(package-propagated-inputs pytest))))))
 
 (define-public python-pytest-bootstrap
   (package
-    (inherit python-pytest)
+    (inherit (strip-python2-variant python-pytest))
     (name "python-pytest-bootstrap")
     (native-inputs `(("python-setuptools-scm" ,python-setuptools-scm)))
-    (arguments `(#:tests? #f))))
+    (arguments `(#:tests? #f))
+    (properties `((python2-variant . ,(delay python2-pytest-bootstrap))))))
 
 (define-public python2-pytest-bootstrap
-  (package-with-python2 python-pytest-bootstrap))
+  (let ((pytest (package-with-python2
+                 (strip-python2-variant python-pytest-bootstrap))))
+    (package (inherit pytest)
+             (propagated-inputs
+              `(("python2-funcsigs" ,python2-funcsigs-bootstrap)
+                ,@(package-propagated-inputs pytest))))))
 
 (define-public python-pytest-cov
   (package

gnu/packages/python.scm

@@ -1157,6 +1157,16 @@ Python file, so it can be easily copied into your project.")
 (define-public python2-six
   (package-with-python2 python-six))
 
+(define-public python-six-bootstrap
+  (package
+    (inherit python-six)
+    (name "python-six-bootstrap")
+    (native-inputs `())
+    (arguments `(#:tests? #f))))
+
+(define-public python2-six-bootstrap
+  (package-with-python2 python-six-bootstrap))
+
 (define-public python-schedule
   (package
     (name "python-schedule")
@@ -1713,6 +1723,15 @@ matching them against a list of media-ranges.")
      "Backport of @code{funcsigs} which was introduced in Python 3.3.")
     (license license:asl2.0)))
 
+(define-public python2-funcsigs-bootstrap
+  (package
+    (inherit python2-funcsigs)
+    (name "python2-funcsigs-bootstrap")
+    (native-inputs `())
+    (arguments
+     `(#:tests? #f
+       ,@(package-arguments python2-funcsigs)))))
+
 (define-public python-pafy
   (package
     (name "python-pafy")
@@ -13175,7 +13194,7 @@ file system events on Linux.")
          "0i3ch700g5fyjp692gprlnzbysl8w0sa2vijbp3s40drvk67xkn9"))))
     (build-system python-build-system)
     (propagated-inputs
-     `(("python-six" ,python-six)))
+     `(("python-six" ,python-six-bootstrap)))
     (home-page "https://github.com/erikrose/more-itertools")
     (synopsis "More routines for operating on iterables, beyond itertools")
     (description "Python's built-in @code{itertools} module implements a