updated taxi simulator

control/countdown_yf.py

@@ -0,0 +1,69 @@
+from time import sleep
+
+def countdown(n):
+    while n:
+        print('\tn ->', n)
+        yield n
+        n -= 1
+        sleep(1)
+
+def foo():
+    for i in range(6, 3, -1):
+        yield i
+    yield from countdown(3)
+
+#for j in foo():
+#    print('j ->', j)
+
+
+def squares(n):
+    yield from [i for i in range(n)]
+    yield from [i*i for i in range(n)]
+
+def squares_stupid(n):
+    for i in range(n):
+        yield i
+
+    for i in range(n):
+        yield i*i
+
+#for s in squares(10):
+#    print(s)
+
+
+def tokenize():
+    while True:
+        source = input('> ')
+        try:
+            obj = eval(source)
+        except BaseException:
+            print('*crash*')
+            return
+        try:
+            it = iter(obj)
+        except TypeError:
+            yield obj
+            return
+        else:
+            yield from it
+
+#g = tokenize()
+
+#for res in g:
+#    print(res)
+
+
+from concurrent.futures import Future
+
+def f():
+    f = future()
+
+def foo(fut):
+    print(fut, fut.result())
+f = Future()
+f.add_done_callback(foo)
+f.set_result(42)
+
+
+
+