Download CSV from an iPython Notebook

Question

I run an iPython Notebook server, and would like users to be able to download a pandas dataframe as a csv file so that they can use it in their own environment. There\'s no

Answer 1

If you want to avoid storing CSVs on the server, you can use this Javascript alternative that create the CSV on the client-side:

from IPython.display import Javascript
js_download = """
var csv = '%s';

var filename = 'results.csv';
var blob = new Blob([csv], { type: 'text/csv;charset=utf-8;' });
if (navigator.msSaveBlob) { // IE 10+
    navigator.msSaveBlob(blob, filename);
} else {
    var link = document.createElement("a");
    if (link.download !== undefined) { // feature detection
        // Browsers that support HTML5 download attribute
        var url = URL.createObjectURL(blob);
        link.setAttribute("href", url);
        link.setAttribute("download", filename);
        link.style.visibility = 'hidden';
        document.body.appendChild(link);
        link.click();
        document.body.removeChild(link);
    }
}
""" % data_in_dataframes.to_csv(index=False).replace('\n','\\n').replace("'","\'")

Javascript(js_download)

Basically, it creates a CSV string in python from the pd dataframe and use it in a small js script that creates a CSV file on the client side and open a saving dialog to save it on the user computer. I tested in my iPython env and it works like a charm!

---

Note that I am escaping the \n. If I don't do so, the js script string will have the CSV variable written on multiple lines.

For example, print "var csv = '%s'" % industries_revenues.to_csv(index=False).replace('\n','\\n') results to this:

var csv = 'Industry,sum_Amount\nBanking,65892584.0\n(...)Finance,20211917.0\n'

Instead of print "var csv = '%s'" % industries_revenues.to_csv(index=False) without the \n escaping that results on a multiple lined and therefore errored javascript:

var csv = 'Industry,sum_Amount
Banking,65892584.0
(...)
Finance,20211917.0
'

I also escape the ' not to break the variable string in javascript.