save project

my_tree.py

 import turtle
-
-pen = turtle.Turtle()
+import random
+pen = turtle.Pen()
 pen.color("sienna")
 pen.speed(1)
 # 画布大小
@@ -21,12 +21,12 @@ def tree(n):
             pen.pensize(n/3)
         else:
             pen.color("sienna")
-            pen.penpensize(n/10)
-        pen.forrward(n)
+            pen.pensize(n/10)
+        pen.forward(n)
         angle=random.random()
         pen.right(30*angle)
         length=1.5*random.random()
-        tree(n-10*lenght)
+        tree(n-10*length)
         pen.left(60*angle)
         tree(n-10*length)
         pen.right(30*angle)

yhrjhergb.py

+def sum_numbers(num):
+    if num==1:
+        return 1
+    temp=sum_numbers(num-1)
+    return num+temp
+result=sum_numbers(100)
+print(result)
\ No newline at end of file