save project

dvojfdi.py

+#获取指定元素出现次数
+verse=["啊","是","去","额","他","他"]
+num=verse.count("他")
+print(num)
+#获取指定元素首次出现下标
+verse=["啊","是","去","额","他","他"]
+position=verse.index("他")
+print(position)
+#统计数值列表元素和
+wasb=[111,222,333,444,555,666,777]
+ssss=sum(wasb)
+print(ssss)
+#
+grade=[111,222,333,444,555,666,777]
+grade.sort()
+print("升序:",grade)
+grade.sort(reverse=True)
+print("降序:",grade)
+