pandas dataframe.to_html()上的分页

Dou*_*ger 8 python pandas

我有一个巨大的熊猫数据帧我转换为html表,即dataframe.to_html(),它约1000行.任何使用分页的简单方法,这样我就不必滚动整行1000行.比如说,查看前50行然后单击下一步以查看后续的50行?

Sho*_*alt 6

我能想到的最佳解决方案包括几个外部JS库:JQuery及其DataTables插件。这将使分页工作不仅仅需要很少的努力。

让我们设置一些HTML,JS和python:

from tempfile import NamedTemporaryFile
import webbrowser

base_html = """
<!doctype html>
<html><head>
<meta http-equiv="Content-type" content="text/html; charset=utf-8">
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.2/jquery.min.js"></script>
<link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/1.10.16/css/jquery.dataTables.css">
<script type="text/javascript" src="https://cdn.datatables.net/1.10.16/js/jquery.dataTables.js"></script>
</head><body>%s<script type="text/javascript">$(document).ready(function(){$('table').DataTable({
    "pageLength": 50
});});</script>
</body></html>
"""

def df_html(df):
    """HTML table with pagination and other goodies"""
    df_html = df.to_html()
    return base_html % df_html

def df_window(df):
    """Open dataframe in browser window using a temporary file"""
    with NamedTemporaryFile(delete=False, suffix='.html') as f:
        f.write(df_html(df))
    webbrowser.open(f.name)
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现在我们可以加载样本数据集进行测试:

from sklearn.datasets import load_iris
import pandas as pd

iris = load_iris()
df = pd.DataFrame(iris.data, columns=iris.feature_names)

df_window(df)
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美丽的结果: 在此处输入图片说明

一些注意事项:

  • Notice the pageLength parameter in the base_html string. This is where I defined the default number of rows per page. You can find other optional parameters in the DataTable options page.
  • The df_window function was tested in a Jupyter Notebook, but should work in plain python as well.
  • You can skip df_window and simply write the returned value from df_html into an HTML file.