Book format changes.

Moved book_format out of code to simplify importing it into the
notebooks. Added code to it to suppress future warnings from
matplotlib 1.4.3, and to set the numpy print precision to 3
decimal places.

code/book_format.py

@@ -1,138 +0,0 @@
-# -*- coding: utf-8 -*-
-
-"""Copyright 2015 Roger R Labbe Jr.
-
-
-Code supporting the book
-
-Kalman and Bayesian Filters in Python
-https://github.com/rlabbe/Kalman-and-Bayesian-Filters-in-Python
-
-
-This is licensed under an MIT license. See the LICENSE.txt file
-for more information.
-"""
-
-from __future__ import (absolute_import, division, print_function,
-                        unicode_literals)
-
-from contextlib import contextmanager
-from distutils.version import LooseVersion
-from IPython.core.display import HTML
-import json
-import matplotlib
-import matplotlib.pylab as pylab
-import matplotlib.pyplot as plt
-import numpy as np
-import os.path
-import sys
-
-
-sys.path.insert(0, './code') # allow us to import book_format
-
-def test_filterpy_version():
-    import filterpy
-    min_version = [0,0,28]
-    v = filterpy.__version__
-    tokens = v.split('.')
-    for i,v in enumerate(tokens):
-        if int(v) > min_version[i]:
-            return
-
-    i = len(tokens) - 1
-    if min_version[i] > int(tokens[i]):
-       raise Exception("Minimum FilterPy version supported is {}.{}.{}.\n"
-                       "Please install a more recent version.\n"
-                       "   ex: pip install filterpy --upgrade".format(
-             *min_version))
-    v = int(tokens[0]*1000)
-
-
-# ensure that we have the correct filterpy loaded. This is
-# called when this module is imported at the top of each book
-# chapter so the reader can see that they need to update FilterPy.
-test_filterpy_version()
-
-
-def equal_axis():
-    pylab.rcParams['figure.figsize'] = 10,10
-    plt.axis('equal')
-
-
-def reset_axis():
-    pylab.rcParams['figure.figsize'] = 11, 4
-
-def set_figsize(x=11, y=4):
-    pylab.rcParams['figure.figsize'] = x, y
-
-
-@contextmanager
-def figsize(x=11, y=4):
-    """Temporarily set the figure size using 'with figsize(a,b):'"""
-
-    size = pylab.rcParams['figure.figsize']
-    set_figsize(x, y)
-    yield
-    pylab.rcParams['figure.figsize'] = size
-
-@contextmanager
-def numpy_precision(precision):
-	old = np.get_printoptions()['precision']
-	np.set_printoptions(precision=precision)
-	yield
-	np.set_printoptions(old)
-
-@contextmanager
-def printoptions(*args, **kwargs):
-    original = np.get_printoptions()
-    np.set_printoptions(*args, **kwargs)
-    yield
-    np.set_printoptions(**original)
-
-def _decode_list(data):
-    rv = []
-    for item in data:
-        if isinstance(item, unicode):
-            item = item.encode('utf-8')
-        elif isinstance(item, list):
-            item = _decode_list(item)
-        elif isinstance(item, dict):
-            item = _decode_dict(item)
-        rv.append(item)
-    return rv
-
-def _decode_dict(data):
-    rv = {}
-    for key, value in data.iteritems():
-        if isinstance(key, unicode):
-            key = key.encode('utf-8')
-        if isinstance(value, unicode):
-            value = value.encode('utf-8')
-        elif isinstance(value, list):
-            value = _decode_list(value)
-        elif isinstance(value, dict):
-            value = _decode_dict(value)
-        rv[key] = value
-    return rv
-
-
-def load_style(directory = '.', name='code/custom.css'):
-    if sys.version_info[0] >= 3:
-        style = json.load(open(os.path.join(directory, "code/538.json")))
-    else:
-        style = json.load(open(directory + "/code/538.json"), object_hook=_decode_dict)
-
-    # matplotlib has deprecated the use of axes.color_cycle as of version
-
-    version = [int(version_no) for version_no in matplotlib.__version__.split('.')]
-    if version[0] > 1 or (version[0] == 1 and version[1] >= 5):
-        style["axes.prop_cycle"] = "cycler('color', ['#6d904f','#013afe', '#202020','#fc4f30','#e5ae38','#A60628','#30a2da','#008080','#7A68A6','#CF4457','#188487','#E24A33'])"
-        style.pop("axes.color_cycle", None)
-
-    plt.rcParams.update(style)
-    reset_axis ()
-    np.set_printoptions(suppress=True)
-
-    styles = open(os.path.join(directory, name), 'r').read()
-    return HTML(styles)
-