tests: replace pycodestyle with black

Drop pycodestyle for code style checking in favor of black. Black is
much faster, stable PEP8 compliant code style checker offering also
automatic formatting. It aims to be very stable and produce smallest
diffs. It's used by many small and big projects.

Running checkstyle with black takes a few seconds with a terse output.
Thus, test-checkstyle-diff is no longer necessary.

Expand scope of checkstyle to all python files in the repo, replacing
test-checkstyle with checkstyle-python.

Also, fixstyle-python is now available for automatic style formatting.

Note: python virtualenv has been consolidated in test/Makefile,
test/requirements*.txt which will eventually be moved to a central
location.  This is required to simply the automated generation of
docker executor images in the CI.

Type: improvement
Change-Id: I022a326603485f58585e879ac0f697fceefbc9c8
Signed-off-by: Klement Sekera <klement.sekera@gmail.com>
Signed-off-by: Dave Wallace <dwallacelf@gmail.com>

1 files changed, 7 insertions, 7 deletions

diff --git a/docs/_scripts/filter_api.py b/docs/_scripts/filter_api.py
index 484881439b8..e22bc5e50f5 100755
--- a/docs/_scripts/filter_api.py
+++ b/docs/_scripts/filter_api.py
@@ -24,9 +24,10 @@ if len(sys.argv) < 2:
 
 patterns = [
     # Search for "define" blocks and treat them as structs
-    (re.compile(r"^.*(manual_.[^\s]+\s+)?define\s+(?P<name>[^\s]+)"),
-     r"typedef struct vl_api_\g<name>_t"),
-
+    (
+        re.compile(r"^.*(manual_.[^\s]+\s+)?define\s+(?P<name>[^\s]+)"),
+        r"typedef struct vl_api_\g<name>_t",
+    ),
     # For every "brief" statement at the start of a comment block, add an
     # xref with whatever is on the same line. This gives us an index page
     # with all the API methods in one place.
@@ -36,14 +37,13 @@ patterns = [
     #  r'/** @xrefitem api "" "VPP API" \g<c> \g<b> \g<c>'),  # capture inline comment close
     # (re.compile(r"/\*\*\s*(?P<b>[\\@]brief)\s+(?P<c>.+)$"),
     #  r'/** @xrefitem api "" "VPP API" \g<c> \g<b> \g<c>'),
-
     # Since structs don't have params, replace @param with @tparam
-    ( re.compile("[\\@]param\\b"), "@tparam"),
+    (re.compile("[\\@]param\\b"), "@tparam"),
 ]
 
 with open(sys.argv[1]) as fd:
     for line in fd:
-        str = line[:-1] # strip \n
+        str = line[:-1]  # strip \n
         for p in patterns:
             str = p[0].sub(p[1], str)
-        sys.stdout.write(str+"\n")
+        sys.stdout.write(str + "\n")