auto save

aa.py

+import turtle
+a=turtle.Pen()
+a.color("red")
+a.pensize(10)
+a.circle(100,360)
+a.penup()
+a.goto(0,-100)
+a.pendown()
+a.circle(200,360)
+a.hideturtle()
+turtle.done()
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test.py

+"""
+a=input().split(",")
+for i in a:
+    print(i,end="")
+
+s="abcdefg"
+print(s[-4:-2].upper())
+a=30
+b=10
+print(b//a)
+
+a=1
+a=a+1
+a+=1
+a*=1
+a//=1
+a-=1
+print(a)
+
+x=1
+x*=3+5**2
+print(x)
+print(type(8/4==4/2 and 2))
+
+a='a'
+print(int(66.3))
+
+a=input("输入：")
+print(type(a))
+"""
+print(1,2,3,4,sep=',')
+print(2 and 1)
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