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Replacing blank values (white space) with NaN in pandas
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If you are exporting the data from the CSV file it can be as simple as this :
df = pd.read_csv(file_csv, na_values=' ')
This will create the data frame as well as replace blank values as Na
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access denied for load data infile in MySQL
...s code works for me:
File tempFile = File.createTempFile(tableName, ".csv");
FileUtils.copyInputStreamToFile(data, tempFile);
JdbcTemplate template = new JdbcTemplate(dataSource);
String path = tempFile.getAbsolutePath().replace('\\', '/');
int rows = template.update(MessageFor...
C++特化模板函数的符号多重定义错误问题 - C/C++ - 清泛网 - 专注C/C++及内核技术
...list 它用尖括号<> 一个小于号和一个大于号括起来.
该列表是模板参数表不能为空,模板参数可以是一个模板类型参数template type
parameter 它代表了一种类型,也可以是一个模板非类型参数template nontype parameter
它代表了一个...
Read first N lines of a file in python
...he best, but for example if N=1000:
import pandas as pd
yourfile = pd.read_csv('path/to/your/file.csv',nrows=1000)
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How do I get currency exchange rates via an API such as Google Finance? [closed]
...se refer to finance.yahoo.com.
Request: http://finance.yahoo.com/d/quotes.csv?e=.csv&f=sl1d1t1&s=USDINR=X
This CSV was being used by a jQuery plugin called [Curry][1]. Curry has since (2017-08-29) moved to use fixer.io instead due to stability issues.
Might be useful if you need more than j...
Is there a way to ignore header lines in a UNIX sort?
... pass the input in a second time to the sed command, like this: cat sortMe.csv | (sed 1q sortMe.csv; sort -t, -k3 -rn) > sorted.csv
– Harry Cramer
Jun 5 at 3:00
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C++ template中typename和class的区别 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ndent type names(嵌套依赖类型名),在 base class lists(基类列表)中或在一个 member initialization list(成员初始化列表)中作为一个 base class identifier(基类标识符)时除外。
For example:
using namespace std;
template <class T> int vcount(vec...
VC 对话框背景颜色、控件颜色 - C/C++ - 清泛网 - 专注C/C++及内核技术
...改其颜色、其背景颜色,比如对静态文本、文本编辑框、列表框等等。
步骤①、②同上方法三中的步骤①、②。
步骤③:利用ClassWizard重载OnCtlColor(…)(即WM_CTLCOLOR消息)时则有些不同:
HBRUSH CTestDlg::OnCtlColor(CDC* pDC, CWnd* pWnd...
选中CListCtrl指定行并发送LVN_ITEMCHANGED消息 - C/C++ - 清泛网 - 专注C/C++及内核技术
选中CListCtrl指定行并发送LVN_ITEMCHANGED消息在使用CListCtrl列表控件的程序中,当我们修改了CListCtrl后需要要定位到已修改的行,可以使用下面的函数实现: 定位并使指定行选中m_list...在使用CListCtrl列表控件的程序中,当我们修改...
如何让CSplitterWnd分割窗口大小改变后不出现滚动条? - C/C++ - 清泛网 - ...
...滚动条?分隔条大小改变后上面窗口出现了滚动条,但是列表数据量并没有占满窗口不应出现滚动条,效果如图:解决方案:上面窗口的OnSize()函数中添加...分隔条大小改变后上面窗口出现了滚动条,但是列表数据量并没有占满...