remove six dependency

Author: nschloe

setup.py

@@ -21,7 +21,7 @@ def read(fname):
     url="https://github.com/nschloe/tikzplotlib",
     author=about["__author__"],
     author_email=about["__email__"],
-    install_requires=["matplotlib >= 1.4.0", "numpy", "Pillow", "six"],
+    install_requires=["matplotlib >= 1.4.0", "numpy", "Pillow"],
     description="Convert matplotlib figures into TikZ/PGFPlots",
     long_description=read("README.md"),
     long_description_content_type="text/markdown",

tikzplotlib/line2d.py

@@ -1,7 +1,6 @@
 import datetime
 
 import numpy
-import six
 from matplotlib.dates import num2date
 
 from . import color as mycol
@@ -213,7 +212,7 @@ def _marker(
     if extra_mark_options:
         mark_options.append(extra_mark_options)
     if marker_face_color is None or (
-        isinstance(marker_face_color, six.string_types) and marker_face_color == "none"
+        isinstance(marker_face_color, str) and marker_face_color == "none"
     ):
         mark_options.append("fill opacity=0")
     else:

tikzplotlib/save.py

@@ -5,7 +5,6 @@
 
 import matplotlib as mpl
 import matplotlib.pyplot as plt
-import six
 
 from . import axes
 from . import image as img
@@ -257,11 +256,7 @@ def save(filepath, *args, encoding=None, **kwargs):
     """
     code = get_tikz_code(*args, filepath=filepath, **kwargs)
     file_handle = codecs.open(filepath, "w", encoding)
-    try:
-        file_handle.write(code)
-    except UnicodeEncodeError:
-        # We're probably using Python 2, so treat unicode explicitly
-        file_handle.write(six.text_type(code).encode("utf-8"))
+    file_handle.write(code)
     file_handle.close()
     return