Download multiple CSVs using Flask?

Question

I have an app that takes in some information, performs some calculations using pandas, and turns the final pandas data frame into a CSV that is then downloaded using the Fla

Answer 1

Building on @desfido's answer above, here would be some code implementation that does not involve using zip, and instead downloads two different files:

from requests_toolbelt import MultipartEncoder

def make_calculation(arg1, arg2):
    '''Does some calculations.
    input: arg1 - string, arg2- string
    puts results in two different dataframes
    and stores them in two different files,
    returns the names of those two files'''
    return filename1, filename2

@app.route('test_app', methods=['GET', 'POST'])
def test_app():
    form = Form1()
    if form.validate_on_submit():
        f1, f2 = make_calculation(str(form.input_1.data), str(form.input_2.data))
        m = MultipartEncoder({
           'field1': (f1, open(f1, 'rb'), 'text/plain'),
           'field2': (f2, open(f2, 'rb'), 'text/plain')
        })
        return Response(m.to_string(), mimetype=m.content_type)
   return render_template('test_app.html', form=form)