importyamlyaml_dict={"sss":"111","ddd":"222"}withopen("a.yaml","w")asf:yaml.safe_dump(yaml_dict,f,encoding='utf-8',allow_unicode=True)withopen("...
#include<iostream>#include<string>usingnamespacestd;classstringfun{charname[20];public:voidconcatString(chara[],charb[]){strcat(a,""...
>>>letters=['a','b','c','d','e','f','g']>>>letters['a','b','c','d','e','f','g']>>>#replacesomevalues>>>lette...
>>>a=['a','b','c']>>>n=[1,2,3]>>>x=[a,n]>>>x[['a','b','c'],[1,2,3]]>>>x[0]['a','b','c']>>>...
importzipfileimportos,shutilimportopenpyxlfile_list_pos=""fileName=""zipfileName=""defun_zip(file_name):"""unzipzipfile"""zip_file=zipfile.ZipFi...
importzipfilefile_name="a.txt"f=zipfile.ZipFile('test.zip','w',zipfile.ZIP_STORED)f.write(file_name)f.close() ...
在当前路径解压zip压缩包，生成同名文件夹，内部目录结构与压缩包一致importzipfileimportosdefun_zip(file_name):"""unzipzipfile"""zip_file=zipfile.ZipFile(file_name)'''ifos.path.is...
importglobx=glob.glob('*.py')print(x) ...
importzlibs=b'witchwhichhaswhichwitcheswristwatch'print(len(s))t=zlib.compress(s)print("*******compress*******")print(t)print("")print(len(t))pr...
'teafortoo'.replace('too','two')输出'teafortwo' ...
importitertoolsoriginal_list=[[2,4,3],[1,5,6],[9],[7,9,0]]new_merged_list=list(itertools.chain(*original_list))print(new_merged_list) ...
importrex=re.findall(r'f[a-z]*','whichfootorhandfellfastest')print(x) ...
importosstatinfo=os.stat('qqq.txt')print(statinfo,"")print(statinfo.st_mode)输出os.stat_result(st_mode=33206,st_ino=13510798882119213,st_dev=28174...
defscope_test():defdo_local():spam="localspam"defdo_nonlocal():nonlocalspamspam="nonlocalspam"defdo_global():globalspamspam="globalspam"spam="te...
importoswithos.scandir(r"C:UsersmacnameDesktop")asit:forentryinit:ifentry.name.startswith('Auto')andentry.is_file():print(entry.name) ...
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。 ...
