Finished removing all dependencies on the six module

8 files changed, 24 insertions, 41 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4fc32546..38b54efb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,6 @@
 ## 0.9.0 (TBD, 2018)
+* Enhancements
+    * ``cmd2`` no longer depends on the ``six`` module
 * Deletions (potentially breaking changes)
     * Deleted all ``optparse`` code which had previously been deprecated in release 0.8.0
         * The ``options`` decorator no longer exists
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index c280b37c..f7eba2fa 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -45,7 +45,6 @@ The tables below list all prerequisites along with the minimum required version
 | Prerequisite                                        | Minimum Version |
 | --------------------------------------------------- | --------------- |
 | [Python](https://www.python.org/downloads/)         | `3.4`           |
-| [six](https://pypi.python.org/pypi/six)             | `1.8`           |
 | [pyparsing](http://pyparsing.wikispaces.com)        | `2.1`           |
 | [pyperclip](https://github.com/asweigart/pyperclip) | `1.6`           |
 
@@ -72,7 +71,6 @@ If Python is already installed in your machine, run the following commands to va
 
 ```shell
 python -V
-pip freeze | grep six
 pip freeze | grep pyparsing
 ```
 
@@ -192,7 +190,7 @@ Once you have cmd2 cloned, before you start any cmd2 application, you first need
 
 ```bash
 # Install cmd2 prerequisites
-pip install -U six pyparsing pyperclip
+pip install -U pyparsing pyperclip
 
 # Install prerequisites for running cmd2 unit tests
 pip install -U pytest
diff --git a/cmd2.py b/cmd2.py
index b1021a28..6ac1fee2 100755
--- a/cmd2.py
+++ b/cmd2.py
@@ -53,7 +53,6 @@ except ImportError:
 import pyparsing
 import pyperclip
 from pyperclip import PyperclipException
-import six.moves as sm  # Used for sm.input
 
 # Collection is a container that is sizable and iterable
 # It was introduced in Python 3.6. We will try to import it, otherwise use our implementation
@@ -2402,9 +2401,9 @@ class Cmd(cmd.Cmd):
         if self.use_rawinput:
             try:
                 if sys.stdin.isatty():
-                    line = sm.input(safe_prompt)
+                    line = input(safe_prompt)
                 else:
-                    line = sm.input()
+                    line = input()
                     if self.echo:
                         sys.stdout.write('{}{}\n'.format(safe_prompt, line))
             except EOFError:
@@ -2798,7 +2797,7 @@ Usage:  Usage: unalias [-a] name [name ...]
         for (idx, (value, text)) in enumerate(fulloptions):
             self.poutput('  %2d. %s\n' % (idx + 1, text))
         while True:
-            response = sm.input(prompt)
+            response = input(prompt)
             hlen = readline.get_current_history_length()
             if hlen >= 1 and response != '':
                 readline.remove_history_item(hlen - 1)
diff --git a/docs/install.rst b/docs/install.rst
index ac8b19a6..be7c61dd 100644
--- a/docs/install.rst
+++ b/docs/install.rst
@@ -98,7 +98,6 @@ either composition or inheritance to achieve the same goal.
 This approach will obviously NOT automatically install the required 3rd-party dependencies, so you need to make sure
 the following Python packages are installed:
 
-  * six
   * pyparsing
   * pyperclip
 
diff --git a/docs/requirements.txt b/docs/requirements.txt
index 44427665..4f05675a 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,5 +1,4 @@
 pyparsing
-six
 pyperclip
 contextlib2
 enum34
diff --git a/tests/test_cmd2.py b/tests/test_cmd2.py
index 9f0b13ee..e4316757 100644
--- a/tests/test_cmd2.py
+++ b/tests/test_cmd2.py
@@ -6,6 +6,7 @@ Copyright 2016 Federico Ceratto <federico.ceratto@gmail.com>
 Released under MIT license, see LICENSE file
 """
 import argparse
+import builtins
 from code import InteractiveConsole
 import os
 import sys
@@ -13,8 +14,6 @@ import io
 import tempfile
 
 import pytest
-import six
-import six.moves as sm
 
 # Python 3.5 had some regressions in the unitest.mock module, so use 3rd party mock if available
 try:
@@ -839,7 +838,7 @@ def test_base_cmdloop_without_queue():
 
     # Mock out the input call so we don't actually wait for a user's response on stdin
     m = mock.MagicMock(name='input', return_value='quit')
-    sm.input = m
+    builtins.input = m
 
     # Need to patch sys.argv so cmd2 doesn't think it was called with arguments equal to the py.test args
     testargs = ["prog"]
@@ -861,7 +860,7 @@ def test_cmdloop_without_rawinput():
 
     # Mock out the input call so we don't actually wait for a user's response on stdin
     m = mock.MagicMock(name='input', return_value='quit')
-    sm.input = m
+    builtins.input = m
 
     # Need to patch sys.argv so cmd2 doesn't think it was called with arguments equal to the py.test args
     testargs = ["prog"]
@@ -916,7 +915,7 @@ def test_interrupt_quit(say_app):
     # Mock out the input call so we don't actually wait for a user's response on stdin
     m = mock.MagicMock(name='input')
     m.side_effect = ['say hello', KeyboardInterrupt(), 'say goodbye', 'eof']
-    sm.input = m
+    builtins.input = m
 
     say_app.cmdloop()
 
@@ -930,7 +929,7 @@ def test_interrupt_noquit(say_app):
     # Mock out the input call so we don't actually wait for a user's response on stdin
     m = mock.MagicMock(name='input')
     m.side_effect = ['say hello', KeyboardInterrupt(), 'say goodbye', 'eof']
-    sm.input = m
+    builtins.input = m
 
     say_app.cmdloop()
 
@@ -1189,7 +1188,7 @@ def select_app():
 def test_select_options(select_app):
     # Mock out the input call so we don't actually wait for a user's response on stdin
     m = mock.MagicMock(name='input', return_value='2')
-    sm.input = m
+    builtins.input = m
 
     food = 'bacon'
     out = run_cmd(select_app, "eat {}".format(food))
@@ -1210,7 +1209,7 @@ def test_select_invalid_option(select_app):
     m = mock.MagicMock(name='input')
     # If side_effect is an iterable then each call to the mock will return the next value from the iterable.
     m.side_effect = ['3', '1']  # First pass and invalid selection, then pass a valid one
-    sm.input = m
+    builtins.input = m
 
     food = 'fish'
     out = run_cmd(select_app, "eat {}".format(food))
@@ -1232,7 +1231,7 @@ def test_select_invalid_option(select_app):
 def test_select_list_of_strings(select_app):
     # Mock out the input call so we don't actually wait for a user's response on stdin
     m = mock.MagicMock(name='input', return_value='2')
-    sm.input = m
+    builtins.input = m
 
     out = run_cmd(select_app, "study")
     expected = normalize("""
@@ -1250,7 +1249,7 @@ Good luck learning {}!
 def test_select_list_of_tuples(select_app):
     # Mock out the input call so we don't actually wait for a user's response on stdin
     m = mock.MagicMock(name='input', return_value='2')
-    sm.input = m
+    builtins.input = m
 
     out = run_cmd(select_app, "procrastinate")
     expected = normalize("""
@@ -1269,7 +1268,7 @@ Have fun procrasinating with {}!
 def test_select_uneven_list_of_tuples(select_app):
     # Mock out the input call so we don't actually wait for a user's response on stdin
     m = mock.MagicMock(name='input', return_value='2')
-    sm.input = m
+    builtins.input = m
 
     out = run_cmd(select_app, "play")
     expected = normalize("""
@@ -1352,7 +1351,7 @@ def test_multiline_complete_empty_statement_raises_exception(multiline_app):
 def test_multiline_complete_statement_without_terminator(multiline_app):
     # Mock out the input call so we don't actually wait for a user's response on stdin when it looks for more input
     m = mock.MagicMock(name='input', return_value='\n')
-    sm.input = m
+    builtins.input = m
 
     command = 'orate'
     args = 'hello world'
@@ -1452,10 +1451,8 @@ def test_echo(capsys):
 def test_pseudo_raw_input_tty_rawinput_true():
     # use context managers so original functions get put back when we are done
     # we dont use decorators because we need m_input for the assertion
-    with mock.patch('sys.stdin.isatty',
-            mock.MagicMock(name='isatty', return_value=True)):
-        with mock.patch('six.moves.input',
-                mock.MagicMock(name='input', side_effect=['set', EOFError])) as m_input:
+    with mock.patch('sys.stdin.isatty', mock.MagicMock(name='isatty', return_value=True)):
+        with mock.patch('builtins.input', mock.MagicMock(name='input', side_effect=['set', EOFError])) as m_input:
             # run the cmdloop, which should pull input from our mocks
             app = cmd2.Cmd()
             app.use_rawinput = True
@@ -1498,10 +1495,8 @@ def piped_rawinput_true(capsys, echo, command):
     out, err = capsys.readouterr()
     return (app, out)
 
-# using the decorator puts the original function at six.moves.input
-# back when this method returns
-@mock.patch('six.moves.input',
-        mock.MagicMock(name='input', side_effect=['set', EOFError]))
+# using the decorator puts the original input function back when this unit test returns
+@mock.patch('builtins.input', mock.MagicMock(name='input', side_effect=['set', EOFError]))
 def test_pseudo_raw_input_piped_rawinput_true_echo_true(capsys):
     command = 'set'
     app, out = piped_rawinput_true(capsys, True, command)
@@ -1509,10 +1504,8 @@ def test_pseudo_raw_input_piped_rawinput_true_echo_true(capsys):
     assert out[0] == '{}{}'.format(app.prompt, command)
     assert out[1].startswith('colors:')
 
-# using the decorator puts the original function at six.moves.input
-# back when this method returns
-@mock.patch('six.moves.input',
-        mock.MagicMock(name='input', side_effect=['set', EOFError]))
+# using the decorator puts the original input function back when this unit test returns
+@mock.patch('builtins.input', mock.MagicMock(name='input', side_effect=['set', EOFError]))
 def test_pseudo_raw_input_piped_rawinput_true_echo_false(capsys):
     command = 'set'
     app, out = piped_rawinput_true(capsys, False, command)
@@ -1554,7 +1547,7 @@ def test_raw_input(base_app):
 
     # Mock out the input call so we don't actually wait for a user's response on stdin
     m = mock.Mock(name='input', return_value=fake_input)
-    sm.input = m
+    builtins.input = m
 
     line = base_app.pseudo_raw_input('(cmd2)')
     assert line == fake_input
diff --git a/tests/test_transcript.py b/tests/test_transcript.py
index 311a3f42..a24f2fa5 100644
--- a/tests/test_transcript.py
+++ b/tests/test_transcript.py
@@ -13,7 +13,6 @@ import random
 
 from unittest import mock
 import pytest
-import six
 
 import cmd2
 from cmd2 import Cmd, Cmd2TestCase, set_posix_shlex, set_strip_quotes
diff --git a/tox.ini b/tox.ini
index c11425be..f68c1cb8 100644
--- a/tox.ini
+++ b/tox.ini
@@ -18,7 +18,6 @@ deps =
   pytest-cov
   pytest-forked
   pytest-xdist
-  six
   wcwidth
 commands =
   py.test {posargs: -n 2} --cov=cmd2 --cov-report=term-missing --forked
@@ -32,7 +31,6 @@ deps =
   pytest
   pytest-forked
   pytest-xdist
-  six
   wcwidth
 commands = py.test -v -n2 --forked
 
@@ -44,7 +42,6 @@ deps =
   pyreadline
   pytest
   pytest-xdist
-  six
 commands = py.test -v -n2
 
 [testenv:py36]
@@ -56,7 +53,6 @@ deps =
   pytest-cov
   pytest-forked
   pytest-xdist
-  six
   wcwidth
 commands =
   py.test {posargs: -n 2} --cov=cmd2 --cov-report=term-missing --forked
@@ -71,7 +67,6 @@ deps =
   pytest
   pytest-cov
   pytest-xdist
-  six
 commands =
   py.test {posargs: -n 2} --cov=cmd2 --cov-report=term-missing
   codecov
@@ -83,7 +78,6 @@ deps =
   pytest
   pytest-forked
   pytest-xdist
-  six
   wcwidth
 commands = py.test -v -n2 --forked