importdatetimebase=datetime.datetime.today()forxinrange(0,5):print(base+datetime.timedelta(days=x)) ...
fromdjango.utils.httpimporturlquotea=urlquote('分享')print(a) ...
fromdatetimeimportdate,timedeltadt=date.today()-timedelta(5)print('CurrentDate:',date.today())print('5daysbeforeCurrentDate:',dt) ...
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])) ...
<!doctypehtml><htmllang="en"><head><metacharset="UTF-8"><metaname="Generator"content="EditPlus®"><metaname=...
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])) ...
mycode='print("helloworld")'code="""defmutiply(x,y):returnx*yprint('Multiplyof2and3is:',mutiply(2,3))"""exec(mycode)exec(code) ...
defstring_reverse(str1):rstr1=''index=len(str1)whileindex>0:rstr1+=str1[index-1]index=index-1returnrstr1print(string_reverse('1234abcd'))&nbs...
defsum_list(items):sum_numbers=0forxinitems:sum_numbers+=xreturnsum_numbersprint(sum_list([1,2,-8])) ...
importcollectionsmy_list=[10,10,10,10,20,20,20,20,40,40,50,50,30]print("OriginalList:",my_list)ctr=collections.Counter(my_list)print("Frequencyo...
color=['Red','Green','White','Black','Pink','Yellow']color=[xfor(i,x)inenumerate(color)ifinotin(0,4,5)]print(color) ...
1.变量赋值：name=lbg等号前后不能有空格name="LebronJames"变量值中有空格要用双引号echo${name}用${}更保险shopt-s-onounset设置“先声明再使用”2.取消变量：unset释放变量和函数的内存3.位置参数：${n}：...
defmultiply_list(items):tot=1forxinitems:tot*=xreturntotprint(multiply_list([1,2,-8])) ...
一句话判断[!$a]&&echo"aisnull" 1.判断变量read-p"inputaword:"wordif[!-n"$word"];thenecho"youhavenotinputaword!"elseecho"thewordyouinputis$wor...
console.log(window.location.host)console.log(document.domain)console.log(window.location.href)console.log(window.domain) 地址栏： 输出...
版权申明：本文为博主窗户(Colin Cai)原创，欢迎转帖。如要转贴，必须注明原文网址 http://www.cnblogs.com/Colin-Cai/p/7899171.html 作者：窗户 QQ：6679072 E-mail：6679072@qq.com bp神经网络为大家所熟知，推导中使用了基于梯度下降。而对于更为一般的情况，解决问题的出发点是建立一组函数fi(Ci,Xi), i=1..n，n为输出的个数，也就是函数的个数，对于每个fi，Ci是一个参数向量，Xi是一个输入向量，我们的目标就是为这组函数中的每个fi找到最合适的Ci。 ...
