1 files changed, 29 insertions, 19 deletions

diff --git a/python/makevars.py b/python/makevars.py
index 63bf8c5ee..951cd3438 100644
--- a/python/makevars.py
+++ b/python/makevars.py
@@ -6,10 +6,12 @@ import os
 import subprocess
 import re
 
+
 class MakeVarsBase(object):
-    '''
+    """
     common code between MakeVars and MakeReVars
-    '''
+    """
+
     def __init__(self):
         self._data = dict()
 
@@ -18,31 +20,35 @@ class MakeVarsBase(object):
             self.getvars([k])
         return self._data[k]
 
-    def get(self, k, defval = None):
+    def get(self, k, defval=None):
         if k not in self._data:
             self.getvars([k])
         return self._data.get(k) or defval
 
+
 class MakeVars(MakeVarsBase):
-    '''
+    """
     makevars['FOO_CFLAGS'] gets you "FOO_CFLAGS" from Makefile
 
     This variant works by invoking make as a subprocess, i.e. Makefile must
     be valid and working.  (This is sometimes a problem if depfiles have not
     been generated.)
-    '''
+    """
+
     def getvars(self, varlist):
-        '''
+        """
         get a batch list of variables from make.  faster than individual calls.
-        '''
+        """
         rdfd, wrfd = os.pipe()
 
-        shvars = ['shvar-%s' % s for s in varlist]
-        make = subprocess.Popen(['make', '-s', 'VARFD=%d' % wrfd] + shvars, pass_fds = [wrfd])
+        shvars = ["shvar-%s" % s for s in varlist]
+        make = subprocess.Popen(
+            ["make", "-s", "VARFD=%d" % wrfd] + shvars, pass_fds=[wrfd]
+        )
         os.close(wrfd)
-        data = b''
+        data = b""
 
-        rdf = os.fdopen(rdfd, 'rb')
+        rdf = os.fdopen(rdfd, "rb")
         while True:
             rdata = rdf.read()
             if len(rdata) == 0:
@@ -52,30 +58,34 @@ class MakeVars(MakeVarsBase):
         del rdf
         make.wait()
 
-        data = data.decode('US-ASCII').strip().split('\n')
+        data = data.decode("US-ASCII").strip().split("\n")
         for row in data:
-            k, v = row.split('=', 1)
+            k, v = row.split("=", 1)
             v = v[1:-1]
             self._data[k] = v
 
+
 class MakeReVars(MakeVarsBase):
-    '''
+    """
     makevars['FOO_CFLAGS'] gets you "FOO_CFLAGS" from Makefile
 
     This variant works by regexing through Makefile.  This means the Makefile
     does not need to be fully working, but on the other hand it doesn't support
     fancy complicated make expressions.
-    '''
-    var_re = re.compile(r'^([^=#\n\s]+)[ \t]*=[ \t]*([^#\n]*)(?:#.*)?$', flags=re.MULTILINE)
-    repl_re = re.compile(r'\$(?:([A-Za-z])|\(([^\)]+)\))')
+    """
+
+    var_re = re.compile(
+        r"^([^=#\n\s]+)[ \t]*=[ \t]*([^#\n]*)(?:#.*)?$", flags=re.MULTILINE
+    )
+    repl_re = re.compile(r"\$(?:([A-Za-z])|\(([^\)]+)\))")
 
     def __init__(self, maketext):
         super(MakeReVars, self).__init__()
-        self._vars = dict(self.var_re.findall(maketext.replace('\\\n', '')))
+        self._vars = dict(self.var_re.findall(maketext.replace("\\\n", "")))
 
     def replacevar(self, match):
         varname = match.group(1) or match.group(2)
-        return self._vars.get(varname, '')
+        return self._vars.get(varname, "")
 
     def getvars(self, varlist):
         for varname in varlist: