Cleanup demo_tight_layout.

- Remove an extraneous plt.show() (the one at the end suffices).
- This example has both pyplot and OO subexamples; if using pyplot,
  don't assign the `fig` name (better be fully implicit than stopping
  half-way); if using OO, use `fig.tight_layout()` instead of
  `plt.tight_layout()`.
- Remove some blank lines.

Author: anntzer

examples/subplots_axes_and_figures/demo_tight_layout.py

@@ -31,7 +31,7 @@ def example_plot(ax):
 
 fig, ax = plt.subplots()
 example_plot(ax)
-plt.tight_layout()
+fig.tight_layout()
 
 ###############################################################################
 
@@ -40,61 +40,53 @@ def example_plot(ax):
 example_plot(ax2)
 example_plot(ax3)
 example_plot(ax4)
-plt.tight_layout()
+fig.tight_layout()
 
 ###############################################################################
 
 fig, (ax1, ax2) = plt.subplots(nrows=2, ncols=1)
 example_plot(ax1)
 example_plot(ax2)
-plt.tight_layout()
+fig.tight_layout()
 
 ###############################################################################
 
 fig, (ax1, ax2) = plt.subplots(nrows=1, ncols=2)
 example_plot(ax1)
 example_plot(ax2)
-plt.tight_layout()
+fig.tight_layout()
 
 ###############################################################################
 
 fig, axs = plt.subplots(nrows=3, ncols=3)
 for ax in axs.flat:
     example_plot(ax)
-plt.tight_layout()
+fig.tight_layout()
 
 ###############################################################################
 
-fig = plt.figure()
-
+plt.figure()
 ax1 = plt.subplot(221)
 ax2 = plt.subplot(223)
 ax3 = plt.subplot(122)
-
 example_plot(ax1)
 example_plot(ax2)
 example_plot(ax3)
-
 plt.tight_layout()
 
 ###############################################################################
 
-fig = plt.figure()
-
+plt.figure()
 ax1 = plt.subplot2grid((3, 3), (0, 0))
 ax2 = plt.subplot2grid((3, 3), (0, 1), colspan=2)
 ax3 = plt.subplot2grid((3, 3), (1, 0), colspan=2, rowspan=2)
 ax4 = plt.subplot2grid((3, 3), (1, 2), rowspan=2)
-
 example_plot(ax1)
 example_plot(ax2)
 example_plot(ax3)
 example_plot(ax4)
-
 plt.tight_layout()
 
-plt.show()
-
 ###############################################################################
 
 fig = plt.figure()
@@ -103,20 +95,16 @@ def example_plot(ax):
 ax1 = fig.add_subplot(gs1[0])
 ax2 = fig.add_subplot(gs1[1])
 ax3 = fig.add_subplot(gs1[2])
-
 example_plot(ax1)
 example_plot(ax2)
 example_plot(ax3)
-
 gs1.tight_layout(fig, rect=[None, None, 0.45, None])
 
 gs2 = fig.add_gridspec(2, 1)
 ax4 = fig.add_subplot(gs2[0])
 ax5 = fig.add_subplot(gs2[1])
-
 example_plot(ax4)
 example_plot(ax5)
-
 with warnings.catch_warnings():
     # gs2.tight_layout cannot handle the subplots from the first gridspec
     # (gs1), so it will raise a warning. We are going to match the gridspecs