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How do I convert dates in a Pandas data frame to a 'date' data type?

... I imagine a lot of data comes into Pandas from CSV files, in which case you can simply convert the date during the initial CSV read: dfcsv = pd.read_csv('xyz.csv', parse_dates=[0]) where the 0 refers to the column the date is in. You could also add , index_col=0 in there...
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C++ 通过主机名/域名获取IP - C/C++ - 清泛网 - 专注C/C++及内核技术

...ct in_addr *)*hostinfo->h_addr_list); //inet_addr()函数把地址串转换IP地址 //调用inet_ntoa()函数,将hostinfo结构变量中的h_addr_list转化标准的IP地址(如202.197.11.12.) //printf(" IP地址: %s/n",ip); //输出IP地址 sprintf(szIPAddr,"%s",i...
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c/c++取结构体指定成员的偏移,及原理解析 - C/C++ - 清泛网 - 专注C/C++及内核技术

...FFSET(s, m) ((size_t)(& ((s*)0)->m )) 原理如下: 1、0即空指针转换结构体空指针。 2、拿结构体中的指定成员的地址即我们要找的偏移,因首地址空,因此成员地址相对0来说即相对偏移。 offsetof
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Linux Glibc幽灵漏洞允许黑客远程获取系统权 - 操作系统(内核) - 清泛网 - ...

...使用gethostbyname*函数发起DNS请求,这个函数会将主机名称转换ip地址。更多的细节可以从下面的视频中看到。 漏洞危害 这个漏洞造成了远程代码执行,攻击者可以利用此漏洞获取系统的完全控制权。 我们能做什么? 给...
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24种设计模式与7大原则 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...构型模式 适配器模式(Adapter pattern): 将一个类的接口, 转换成客户期望的另一个接口. 适配器让原本接口不兼容的类可以合作无间. 对象适配器使用组合, 类适配器使用多重继承. 桥接模式(Bridge pattern): 使用桥接模式通过将实现...
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Unicode and UTF-8 - 综合 - 清泛IT论坛,有思想、有深度

...,Unicode的实现方式各不相同,Unicode的实现方式称Unicode转换格式(Unicode Translation Format,简称UTF)如UTF-16。UTF-16采用双字节对UCS-2字符进行编码,由于UCS-2本身也是双字节编码,故一般UTF-16编码和UCS-2编码可等同对待,但由于...
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PostgreSQL query to return results as a comma separated list

... You can generate a CSV from any SQL query using psql: $ psql > \o myfile.csv > \f ',' > \a > SELECT col1 AS column1, col2 AS column2 ... FROM ... The resulting myfile.csv will have the SQL resultset column names as CSV column h...
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Is Response.End() considered harmful?

...rmation on response.end so for other searches like myself who wish to post CSV/XML/PDF etc in response to an event without rendering the entire ASPX page, this is how I do it. (overriding the render methods is overly complex for such a simple task IMO) // Add headers for a csv file or whatever Resp...
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Java: splitting a comma-separated string but ignoring commas in quotes

... http://sourceforge.net/projects/javacsv/ https://github.com/pupi1985/JavaCSV-Reloaded (fork of the previous library that will allow the generated output to have Windows line terminators \r\n when not running Windows) http://opencsv.sourceforge.net/ CSV API f...
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MFC 的SetWindowPos 用法 - C/C++ - 清泛网 - 专注C/C++及内核技术

...:保持当前大小(忽略cx和cy) SWP_NOZORDER:保持窗口在列的当前位置(忽略hWndInsertAfter) SWP_SHOWWINDOW:显示窗口 这些参数可以使用Or运算组合,所以如果你不希望改变窗口位置和大小,你只需要给最后一个参数传递(S...