Improve codestyle

[Flake error E741](https://www.flake8rules.com/rules/E741.html) fixed.
Replaced single digit variablenames with meaningful names
Replaced re enum with its long version

Fixes #14

lib/cfv/common.py

@@ -735,10 +735,10 @@ class FooSum_Base(TextChksumType):
     def do_test_chksumfile_print_testingline(self, file):
         TextChksumType.do_test_chksumfile_print_testingline(self, file, parse_commentline(file.peekline(512), ';#'))
 
-    def do_test_chksumline(self, l):
-        if l[0] in ';#':
+    def do_test_chksumline(self, line):
+        if line[0] in ';#':
             return
-        x = self._foosum_rem.match(l)
+        x = self._foosum_rem.match(line)
         if not x:
             return -1
         if x.group(2) == ' ':
@@ -897,8 +897,8 @@ def auto_chksumfile_match(file, _autorem=re.compile(r'MD5 \(.+\) = [0-9a-fA-F]{3
 
     _bsdmd5rem = re.compile(r'MD5 \((.+)\) = ([0-9a-fA-F]{32})[\r\n]*$')
 
-    def do_test_chksumline(self, l):
-        x = self._bsdmd5rem.match(l)
+    def do_test_chksumline(self, line):
+        x = self._bsdmd5rem.match(line)
         if not x:
             return -1
         self.test_file(x.group(1), unhexlify(x.group(2)))
@@ -1397,10 +1397,10 @@ def do_test_chksumfile_print_testingline(self, file):
         # override the default testing line to show first SFV comment line, if any
         TextChksumType.do_test_chksumfile_print_testingline(self, file, parse_commentline(file.peekline(512), ';'))
 
-    def do_test_chksumline(self, l):
-        if l[0] == ';':
+    def do_test_chksumline(self, line):
+        if line[0] == ';':
             return
-        x = self._sfvrem.match(l)
+        x = self._sfvrem.match(line)
         if not x:
             return -1
         self.test_file(x.group(1), unhexlify(x.group(2)))
@@ -1502,8 +1502,8 @@ def auto_chksumfile_match(file, _autorem=re.compile(_csvfnautore + '[0-9]+,[0-9a
 
     _csvrem = re.compile(_csvfnre + r'([0-9]+),([0-9a-fA-F]{8}),')
 
-    def do_test_chksumline(self, l):
-        x = self._csvrem.match(l)
+    def do_test_chksumline(self, line):
+        x = self._csvrem.match(line)
         if not x:
             return -1
         self.test_file(csvunquote(x.group(1), x.group(2)), unhexlify(x.group(4)), int(x.group(3)))
@@ -1534,8 +1534,8 @@ def auto_chksumfile_match(file, _autorem=re.compile(r'%s[0-9]+,[0-9a-fA-F]{8},%s
 
     _csv4rem = re.compile(r'%s([0-9]+),([0-9a-fA-F]{8}),%s' % (_csvfnre, _csvstrre))
 
-    def do_test_chksumline(self, l):
-        x = self._csv4rem.match(l)
+    def do_test_chksumline(self, line):
+        x = self._csv4rem.match(line)
         if not x:
             return -1
         name = csvunquote(x.group(1), x.group(2))
@@ -1569,8 +1569,8 @@ def auto_chksumfile_match(file, _autorem=re.compile(_csvfnautore + '[0-9]+,[\n\r
 
     _csv2rem = re.compile(_csvfnre + r'([0-9]+),')
 
-    def do_test_chksumline(self, l):
-        x = self._csv2rem.match(l)
+    def do_test_chksumline(self, line):
+        x = self._csv2rem.match(line)
         if not x:
             return -1
         self.test_file(csvunquote(x.group(1), x.group(2)), None, int(x.group(3)))
@@ -1646,11 +1646,11 @@ def do_test_chksumfile_print_testingline(self, file):
     _commentboundary = re.compile(r'^-+(\s+-+){1,4}\s*$')
     _nstrip = re.compile(r'[.,]')
 
-    def do_test_chksumline(self, l):
-        if self._commentboundary.match(l):
+    def do_test_chksumline(self, line):
+        if self._commentboundary.match(line):
             self.in_comments = not self.in_comments
             return
-        x = self._crcrem.match(l)
+        x = self._crcrem.match(line)
         if not x:
             if self.in_comments:
                 return

lib/cfv/osutil.py

@@ -109,7 +109,7 @@ def path_split(filename):
     return parts
 
 
-def strippath(filename, num='a', _splitdrivere=re.compile(r'[a-z]:[/\\]', re.I)):
+def strippath(filename, num='a', _splitdrivere=re.compile(r'[a-z]:[/\\]', re.IGNORECASE)):
     """Strip off path components from the left side of the filename.
 
     >>> strippath(os.path.join('c:','foo','bar','baz'))

lib/cfv/strutil.py

@@ -3,17 +3,17 @@
 from StringIO import StringIO
 
 
-def safesort(l):
+def safesort(line):
     sl = []
     ul = []
-    for s in l:
+    for s in line:
         if isinstance(s, str):
             sl.append(s)
         else:
             ul.append(s)
     sl.sort()
     ul.sort()
-    l[:] = ul + sl
+    line[:] = ul + sl
 
 
 def showfn(s):

test/cfvtest.py

@@ -46,7 +46,7 @@ def isatty(self):
     def write(self, s):
         pass
 
-    def writelines(self, l):
+    def writelines(self, lines):
         pass
 
     def flush(self):