l=["hi","hello","world"]print("".join(l))输出：hihelloworld str1="hihelloworld"print(str1.split(""))输出['hi','hello','world']  ...

 classSolution(object):deftwoSum(self,nums,target):dic={}fori,numinenumerate(nums):ifnumindic:return[dic[num],i]else:dic[target-num]=ix=Solution()l=[1,3,5,...

 classSolution(object):defaddTwoNumbers(self,l1,l2):　　　　　k1=''.join(list(map(str,l1)))k2=''.join(list(map(str,l2)))returnint(k1)+int(k2)l1=[1,2,3]l2=[1,1,1...

uu...

 dir/b ...

 >>>s='spam'>>>t=list(s)>>>t['s','p','a','m']Becauselististhenameofabuilt-infunction,youshouldavoidusingitasavariablename.Ialsoa...

 Thereareseveralwaystodeleteelementsfromalist.Ifyouknowtheindexoftheelementyouwant,youcanusepop:>>>t=['a','b','c']>>>x=t.pop(1)>>&g...

 #include<list>#include<iostream>#include<iterator>usingnamespacestd;intmain(){list<int>c{0,1,2,3,4,5,6,7,8,9};for(auto&i:c){co...

 #lst=["篮球","排球","乒乓球","足球","电子竞技","台球"]#forelinlst:#lst.remove(el)#print(lst)#['排球','足球','台球']会发现删不干净原因是:删除一个.元素的索引重新排序,for循环向后走一个,就漏掉一个删掉了索引是0的元素,然后索引是1的...

 >>>importbisect>>>scores=[(100,'perl'),(200,'tcl'),(400,'lua'),(500,'python')]>>>bisect.insort(scores,(300,'ruby'))>>>...

 >>>letters=['a','b','c','d','e','f','g']>>>letters['a','b','c','d','e','f','g']>>>#replacesomevalues>>>letters[2:5]=['...

 >>>a=['a','b','c']>>>n=[1,2,3]>>>x=[a,n]>>>x[['a','b','c'],[1,2,3]]>>>x[0]['a','b','c']>>>x[0][1]'b'...

 keys=['red','green','blue']values=['#FF0000','#008000','#0000FF']color_dictionary=dict(zip(keys,values))print(color_dictionary) ...

 deflist_sum(num_List):iflen(num_List)==1:returnnum_List[0]else:returnnum_List[0]+list_sum(num_List[1:])print(list_sum([2,4,5,6,7])) ...

 defis_even_num(l):enum=[]forninl:ifn%2==0:enum.append(n)returnenumprint(is_even_num([1,2,3,4,5,6,7,8,9])) ...