#新元素

selenium 指定滚动到某个元素

 fromseleniumimportwebdriverfromselenium.common.exceptionsimportNoSuchElementExceptionfromselenium.webdriver.common.byimportByfromselenium.webdriver.common...

go 语言字典元素删除

 packagemainimport"fmt"funcmain(){/*创建map*/countryCapitalMap:=map[string]string{"France":"Paris","Italy":"Rome","Japan":"Tokyo","India":"Newdelhi"}fmt.Prin...

python 重复元素排序

 defcounting_sort(array1,max_val):m=max_val+1count=[0]*mforainarray1:#countoccurencescount[a]+=1i=0forainrange(m):forcinrange(count[a]):array1[i]=ai+=1retu...
代码星球 ·2020-08-09

python input输入元素相加

 sum=0number=1whileTrue:ifnumber==0:breaknumber=int(input('数字0为结束程序,请输入数字:'))sum+=numberprint('目前累加的结果为:%d'%sum)输出数字0为结束程序,请输入数字:9目前累加的结果为:9数字0为结束程序,请输入数字:...

python find 返回元素的索引

 Asitturnsout,thereisastringmethodnamedfindthatisremarkablysimilartothefunctionwewrote:>>>word='banana'>>>index=word.find('a')>>>...

删除列表元素

 Thereareseveralwaystodeleteelementsfromalist.Ifyouknowtheindexoftheelementyouwant,youcanusepop:>>>t=['a','b','c']>>>x=t.pop(1)>>&g...
代码星球 ·2020-08-09

c++ 反转容器的元素顺序(reverse)

 #include<vector>#include<iostream>#include<iterator>#include<algorithm>usingnamespacestd;intmain(){vector<int>v{1,2,3};rever...

c++ 列表删除元素(erase)

 #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...

c++ 插入容器元素(insert)

 #include<iostream>#include<vector>usingnamespacestd;intmain(){vector<int>myints;cout<<"0.size:"<<myints.size()<<'';for...

python 在列表中添加元组元素,按照元组第一个值进行排序

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

python 列表元素替换以及删除

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

python 获取二维数组所有元素

 importitertoolsoriginal_list=[[2,4,3],[1,5,6],[9],[7,9,0]]new_merged_list=list(itertools.chain(*original_list))print(new_merged_list) ...

python 删除字典元素

 myDict={'a':1,'b':2,'c':3,'d':4}print(myDict)if'a'inmyDict:delmyDict['a']print(myDict) ...
代码星球 ·2020-08-09

python 字典元素值的乘积

 my_dict={'data1':100,'data2':-54,'data3':247}result=1forkeyinmy_dict:result=result*my_dict[key]print(result) ...
代码星球 ·2020-08-09

python 字典添加元素

 d={0:10,1:20}print(d)d.update({2:30})print(d) ...
代码星球 ·2020-08-09
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