修改 or 为 and

Author: dchaofei

python6/3.md

@@ -9,7 +9,7 @@
 
 def sum(num1,num2):
 	# 两数之和
-	if not (isinstance (num1,(int ,float)) or isinstance (num2,(int ,float))):
+	if not (isinstance (num1,(int ,float)) and isinstance (num2,(int ,float))):
 		raise TypeError('参数类型错误')
 	return num1+num2