Use raw strings to avoid invalid escape sequences.

Author: QuLogic

examples/lines_bars_and_markers/marker_reference.py

@@ -34,7 +34,7 @@ def nice_repr(text):
 
 def math_repr(text):
     tx = repr(text).lstrip('u').strip("'").strip("$")
-    return "'\${}\$'".format(tx)
+    return r"'\${}\$'".format(tx)
 
 
 def split_list(a_list):

examples/recipes/fill_between_alpha.py

@@ -81,7 +81,7 @@
 ax.plot(t, mu2, lw=2, label='mean population 2', color='yellow')
 ax.fill_between(t, mu1+sigma1, mu1-sigma1, facecolor='blue', alpha=0.5)
 ax.fill_between(t, mu2+sigma2, mu2-sigma2, facecolor='yellow', alpha=0.5)
-ax.set_title('random walkers empirical $\mu$ and $\pm \sigma$ interval')
+ax.set_title(r'random walkers empirical $\mu$ and $\pm \sigma$ interval')
 ax.legend(loc='upper left')
 ax.set_xlabel('num steps')
 ax.set_ylabel('position')

examples/recipes/placing_text_boxes.py

@@ -20,7 +20,10 @@
 mu = x.mean()
 median = np.median(x)
 sigma = x.std()
-textstr = '$\mu=%.2f$\n$\mathrm{median}=%.2f$\n$\sigma=%.2f$' % (mu, median, sigma)
+textstr = '\n'.join((
+    r'$\mu=%.2f$' % (mu, ),
+    r'$\mathrm{median}=%.2f$' % (median, ),
+    r'$\sigma=%.2f$' % (sigma, )))
 
 ax.hist(x, 50)
 # these are matplotlib.patch.Patch properties

examples/scales/power_norm.py

@@ -25,7 +25,7 @@
 axes[0, 0].hist2d(data[:, 0], data[:, 1], bins=100)
 
 for ax, gamma in zip(axes.flat[1:], gammas):
-    ax.set_title('Power law $(\gamma=%1.1f)$' % gamma)
+    ax.set_title(r'Power law $(\gamma=%1.1f)$' % gamma)
     ax.hist2d(data[:, 0], data[:, 1],
               bins=100, norm=mcolors.PowerNorm(gamma))
 

examples/text_labels_and_annotations/arrow_demo.py

@@ -213,7 +213,7 @@ def draw_arrow(pair, alpha=alpha, ec=ec, labelcolor=labelcolor):
         coords = np.dot(orig_position, M) + [[x_pos, y_pos]]
         x, y = np.ravel(coords)
         orig_label = rate_labels[pair]
-        label = '$%s_{_{\mathrm{%s}}}$' % (orig_label[0], orig_label[1:])
+        label = r'$%s_{_{\mathrm{%s}}}$' % (orig_label[0], orig_label[1:])
 
         plt.text(x, y, label, size=label_text_size, ha='center', va='center',
                  color=labelcolor or fc)

examples/ticks_and_spines/spines_bounds.py

@@ -22,7 +22,7 @@
 # set ticks and tick labels
 ax.set_xlim((0, 2*np.pi))
 ax.set_xticks([0, np.pi, 2*np.pi])
-ax.set_xticklabels(['0', '$\pi$', '2$\pi$'])
+ax.set_xticklabels(['0', r'$\pi$', r'2$\pi$'])
 ax.set_ylim((-1.5, 1.5))
 ax.set_yticks([-1, 0, 1])
 

lib/matplotlib/sphinxext/plot_directive.py

@@ -340,7 +340,7 @@ def remove_coding(text):
     Remove the coding comment, which six.exec\_ doesn't like.
     """
     cbook.warn_deprecated('3.0', name='remove_coding', removal='3.1')
-    sub_re = re.compile("^#\s*-\*-\s*coding:\s*.*-\*-$", flags=re.MULTILINE)
+    sub_re = re.compile(r"^#\s*-\*-\s*coding:\s*.*-\*-$", flags=re.MULTILINE)
     return sub_re.sub("", text)
 
 #------------------------------------------------------------------------------

tests.py

@@ -33,7 +33,7 @@
         category=DeprecationWarning)
     warnings.filterwarnings(
         'default',
-        '.*inspect.getargspec\(\) is deprecated.*',
+        r'.*inspect.getargspec\(\) is deprecated.*',
         category=DeprecationWarning)
 
     from matplotlib import test

tutorials/text/annotations.py

@@ -1,4 +1,4 @@
-"""
+r"""
 Annotations
 ===========
 

tutorials/text/pgf.py

@@ -1,4 +1,4 @@
-"""
+r"""
 *********************************
 Typesetting With XeLaTeX/LuaLaTeX
 *********************************