使用Flask将Pandas数据框转换为CSV并提供下载 [英] Use Flask to convert a Pandas dataframe to CSV and serve a download

问题描述

我的Flask应用程序中有一个熊猫数据框，我想以CSV文件的形式返回.

I have a Pandas dataframe in my Flask app that I want to return as a CSV file.

return Response(df.to_csv())

问题是输出显示在浏览器中，而不是作为单独的文件下载.我该如何更改?

The problem is that the output appears in the browser instead of downloading as a separate file. How can I change that?

我也尝试了以下方法，但是它只给出了空的输出​​.

I tried the following as well but it just gave empty output.

response = make_response(df.to_csv())
response.headers['Content-Type'] = 'text/csv'
return Response(response)

推荐答案

设置Content-Disposition告诉浏览器下载文件，而不是在页面上显示其内容.

Set the Content-Disposition to tell the browser to download the file instead of showing its content on the page.

resp = make_response(df.to_csv())
resp.headers["Content-Disposition"] = "attachment; filename=export.csv"
resp.headers["Content-Type"] = "text/csv"
return resp

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