初次创建仓库提交代码

1. 已经构建好了架子了。
2. 添加了示例的插件

thirdparty/py_trees/demos/sequence.py

@@ -0,0 +1,118 @@
+#!/usr/bin/env python
+#
+# License: BSD
+#   https://raw.githubusercontent.com/splintered-reality/py_trees/devel/LICENSE
+#
+##############################################################################
+# Documentation
+##############################################################################
+
+"""
+.. argparse::
+   :module: py_trees.demos.sequence
+   :func: command_line_argument_parser
+   :prog: py-trees-demo-sequence
+
+.. graphviz:: dot/demo-sequence.dot
+
+.. image:: images/sequence.gif
+"""
+
+##############################################################################
+# Imports
+##############################################################################
+
+import argparse
+import py_trees
+import sys
+import time
+
+import py_trees.console as console
+
+##############################################################################
+# Classes
+##############################################################################
+
+
+def description():
+    content = "Demonstrates sequences in action.\n\n"
+    content += "A sequence is populated with 2-tick jobs that are allowed to run through to\n"
+    content += "completion.\n"
+
+    if py_trees.console.has_colours:
+        banner_line = console.green + "*" * 79 + "\n" + console.reset
+        s = "\n"
+        s += banner_line
+        s += console.bold_white + "Sequences".center(79) + "\n" + console.reset
+        s += banner_line
+        s += "\n"
+        s += content
+        s += "\n"
+        s += banner_line
+    else:
+        s = content
+    return s
+
+
+def epilog():
+    if py_trees.console.has_colours:
+        return console.cyan + "And his noodly appendage reached forth to tickle the blessed...\n" + console.reset
+    else:
+        return None
+
+
+def command_line_argument_parser():
+    parser = argparse.ArgumentParser(description=description(),
+                                     epilog=epilog(),
+                                     formatter_class=argparse.RawDescriptionHelpFormatter,
+                                     )
+    parser.add_argument('-r', '--render', action='store_true', help='render dot tree to file')
+    return parser
+
+
+def create_root():
+    root = py_trees.composites.Sequence("Sequence")
+    for action in ["Action 1", "Action 2", "Action 3"]:
+        success_after_two = py_trees.behaviours.Count(name=action,
+                                                      fail_until=0,
+                                                      running_until=1,
+                                                      success_until=10)
+        root.add_child(success_after_two)
+    return root
+
+
+##############################################################################
+# Main
+##############################################################################
+
+def main():
+    """
+    Entry point for the demo script.
+    """
+    args = command_line_argument_parser().parse_args()
+    print(description())
+    py_trees.logging.level = py_trees.logging.Level.DEBUG
+
+    root = create_root()
+
+    ####################
+    # Rendering
+    ####################
+    if args.render:
+        py_trees.display.render_dot_tree(root)
+        sys.exit()
+
+    ####################
+    # Execute
+    ####################
+    root.setup_with_descendants()
+    for i in range(1, 6):
+        try:
+            print("\n--------- Tick {0} ---------\n".format(i))
+            root.tick_once()
+            print("\n")
+            print(py_trees.display.unicode_tree(root=root, show_status=True))
+            time.sleep(1.0)
+        except KeyboardInterrupt:
+            break
+    print("\n")