remove six dependency

lib/woothee/util.py

@@ -1,13 +1,12 @@
 # -*- coding: utf-8 -*-
 from __future__ import (division, print_function,
                         absolute_import, unicode_literals)
-import six
 
 from . import dataset
 
 
 def update_map(target, source):
-    for key in six.iterkeys(source):
+    for key in source.keys():
         if key == dataset.KEY_LABEL or key == dataset.KEY_TYPE:
             continue
         if len(source[key]) > 0:

scripts/dataset_yaml2py.py

@@ -6,8 +6,6 @@
 import yaml
 import datetime
 
-import six
-
 base_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 dataset_file = os.path.join(base_dir, 'woothee', 'dataset.yaml')
 py_file = os.path.join(base_dir, 'lib', 'woothee', 'dataset.py')
@@ -115,8 +113,8 @@ def get(label):
     return DATASET[label]
 """ % dynamic_lines
 
-fp = open(py_file, 'wb')
+fp = open(py_file, 'w')
 try:
-    fp.write(six.b(module_text))
+    fp.write(module_text)
 finally:
     fp.close()

setup.py

@@ -31,7 +31,7 @@
 ]
 
 
-install_requires = ['six>=1.8.0']
+install_requires = []
 
 if sys.version_info < (3, 5):
     install_requires.append('typing')
@@ -72,7 +72,7 @@ def run(self):
     },
     platforms='any',
     install_requires=install_requires,
-    setup_requires=['PyYAML>=3.10', 'six>=1.8.0', 'pytest-runner'],
+    setup_requires=['PyYAML>=3.10', 'pytest-runner'],
     tests_require=['pytest', 'pytest-cov', 'pytest-mock'],
     long_description=long_description,
     classifiers=classifiers,