1"""
2================================
3Filled and unfilled-marker types
4================================
5
6Reference for filled- and unfilled-marker types included with Matplotlib.
7"""
8from six import iteritems
9import numpy as np
10import matplotlib.pyplot as plt
11from matplotlib.lines import Line2D
12
13
14points = np.ones(3)  # Draw 3 points for each line
15text_style = dict(horizontalalignment='right', verticalalignment='center',
16                  fontsize=12, fontdict={'family': 'monospace'})
17marker_style = dict(linestyle=':', color='cornflowerblue', markersize=10)
18
19
20def format_axes(ax):
21    ax.margins(0.2)
22    ax.set_axis_off()
23
24
25def nice_repr(text):
26    return repr(text).lstrip('u')
27
28
29def split_list(a_list):
30    i_half = len(a_list) // 2
31    return (a_list[:i_half], a_list[i_half:])
32
33###############################################################################
34# Plot all un-filled markers
35
36fig, axes = plt.subplots(ncols=2)
37
38# Filter out filled markers and marker settings that do nothing.
39# We use iteritems from six to make sure that we get an iterator
40# in both python 2 and 3
41unfilled_markers = [m for m, func in iteritems(Line2D.markers)
42                    if func != 'nothing' and m not in Line2D.filled_markers]
43# Reverse-sort for pretty. We use our own sort key which is essentially
44# a python3 compatible reimplementation of python2 sort.
45unfilled_markers = sorted(unfilled_markers,
46                          key=lambda x: (str(type(x)), str(x)))[::-1]
47for ax, markers in zip(axes, split_list(unfilled_markers)):
48    for y, marker in enumerate(markers):
49        ax.text(-0.5, y, nice_repr(marker), **text_style)
50        ax.plot(y * points, marker=marker, **marker_style)
51        format_axes(ax)
52fig.suptitle('un-filled markers', fontsize=14)
53
54
55###############################################################################
56# Plot all filled markers.
57
58fig, axes = plt.subplots(ncols=2)
59for ax, markers in zip(axes, split_list(Line2D.filled_markers)):
60    for y, marker in enumerate(markers):
61        ax.text(-0.5, y, nice_repr(marker), **text_style)
62        ax.plot(y * points, marker=marker, **marker_style)
63        format_axes(ax)
64fig.suptitle('filled markers', fontsize=14)
65
66plt.show()
67