摘要：
l1=[i for i in range(1,10)]# l1=1,2,3,4,5,6,7,8,9,10,11,12,13,14# # start_index=0# # end_index=len(l1)-1# while start_index<=end_index:# # mid_index=( 阅读全文
摘要：
第一种：s1 = 'python,java,php,go,c,python,java,php,go,c,python,java,php,go,c's=s1.split(',')# dic={}# for i in s:# if i not in dic:# dic[i]=1# else:# dic[ 阅读全文
