Remove six from console, eliminates six entirely (#552)

fire/console/console_attr.py

@@ -100,8 +100,6 @@
 from fire.console import encoding as encoding_util
 from fire.console import text
 
-import six
-
 
 # TODO: Unify this logic with console.style.mappings
 class BoxLineCharacters(object):
@@ -355,9 +353,9 @@ def ConvertOutputToUnicode(self, buf):
     Returns:
       The console output string buf converted to unicode.
     """
-    if isinstance(buf, six.text_type):
+    if isinstance(buf, str):
       buf = buf.encode(self._encoding)
-    return six.text_type(buf, self._encoding, 'replace')
+    return str(buf, self._encoding, 'replace')
 
   def GetBoxLineCharacters(self):
     """Returns the box/line drawing characters object.
@@ -480,7 +478,7 @@ def DisplayWidth(self, buf):
     Returns:
       The display width of buf, handling unicode and ANSI controls.
     """
-    if not isinstance(buf, six.string_types):
+    if not isinstance(buf, str):
       # Handle non-string objects like Colorizer().
       return len(buf)
 
@@ -595,16 +593,16 @@ def __init__(self, string, color, justify=None):
     self._justify = justify
 
   def __eq__(self, other):
-    return self._string == six.text_type(other)
+    return self._string == str(other)
 
   def __ne__(self, other):
     return not self == other
 
   def __gt__(self, other):
-    return self._string > six.text_type(other)
+    return self._string > str(other)
 
   def __lt__(self, other):
-    return self._string < six.text_type(other)
+    return self._string < str(other)
 
   def __ge__(self, other):
     return not self < other
@@ -692,7 +690,7 @@ def GetCharacterDisplayWidth(char):
   Returns:
     The monospaced terminal display width of char: either 0, 1, or 2.
   """
-  if not isinstance(char, six.text_type):
+  if not isinstance(char, str):
     # Non-unicode chars have width 1. Don't use this function on control chars.
     return 1
 
@@ -779,7 +777,7 @@ def EncodeToBytes(data):
     return data
 
   # Coerce to text that will be converted to bytes.
-  s = six.text_type(data)
+  s = str(data)
 
   try:
     # Assume the text can be directly converted to bytes (8-bit ascii).

fire/console/encoding.py

@@ -22,8 +22,6 @@
 
 import sys
 
-import six
-
 
 def Encode(string, encoding=None):
   """Encode the text string to a byte string.
@@ -35,18 +33,7 @@ def Encode(string, encoding=None):
   Returns:
     str, The binary string.
   """
-  if string is None:
-    return None
-  if not six.PY2:
-    # In Python 3, the environment sets and gets accept and return text strings
-    # only, and it handles the encoding itself so this is not necessary.
-    return string
-  if isinstance(string, six.binary_type):
-    # Already an encoded byte string, we are done
-    return string
-
-  encoding = encoding or _GetEncoding()
-  return string.encode(encoding)
+  return string
 
 
 def Decode(data, encoding=None):
@@ -67,20 +54,13 @@ def Decode(data, encoding=None):
     return None
 
   # First we are going to get the data object to be a text string.
-  # Don't use six.string_types here because on Python 3 bytes is not considered
-  # a string type and we want to include that.
-  if isinstance(data, six.text_type) or isinstance(data, six.binary_type):
+  if isinstance(data, str) or isinstance(data, bytes):
     string = data
   else:
     # Some non-string type of object.
-    try:
-      string = six.text_type(data)
-    except (TypeError, UnicodeError):
-      # The string cannot be converted to unicode -- default to str() which will
-      # catch objects with special __str__ methods.
-      string = str(data)
+    string = str(data)
 
-  if isinstance(string, six.text_type):
+  if isinstance(string, str):
     # Our work is done here.
     return string
 
@@ -199,7 +179,8 @@ def EncodeEnv(env, encoding=None):
   encoding = encoding or _GetEncoding()
   return {
       Encode(k, encoding=encoding): Encode(v, encoding=encoding)
-      for k, v in six.iteritems(env)}
+      for k, v in env.items()
+  }
 
 
 def _GetEncoding():

fire/console/files.py

@@ -24,8 +24,6 @@
 from fire.console import encoding as encoding_util
 from fire.console import platforms
 
-import six
-
 
 def _GetSystemPath():
   """Returns properly encoded system PATH variable string."""
@@ -48,7 +46,7 @@ def _FindExecutableOnPath(executable, path, pathext):
     ValueError: invalid input.
   """
 
-  if isinstance(pathext, six.string_types):
+  if isinstance(pathext, str):
     raise ValueError('_FindExecutableOnPath(..., pathext=\'{0}\') failed '
                      'because pathext must be an iterable of strings, but got '
                      'a string.'.format(pathext))

setup.py

@@ -29,7 +29,6 @@
 A library for automatically generating command line interfaces.""".strip()
 
 DEPENDENCIES = [
-    'six',
     'termcolor',
 ]