auto save

look.py

+total=[]
+def look():
+    #total=[]
+    while True:
+        unit=input("请输入")
+        if unit=="q":
+            break
+        try:
+            int(unit)
+        except:
+            print("输入合法字符")
+        else:
+            total.append(unit)
+    return total
+
+look()
+print(total)
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