Downloading a file with Selenium and Python

example.py

"""
Automatically downloading Excel file from a form.

Initially because accessing __doPostBack function was too hard to script in Python.

Software installed using conda and homebrew.
 - selenium from conda
 - geckodriver from homebrew
"""
import os
from selenium import webdriver

def main():
    """ Setup Firefox profile preferences and go get em"""
    profile = webdriver.FirefoxProfile()
    profile.set_preference('browser.download.folderList', 2)
    profile.set_preference('browser.download.manager.showWhenStarting', False)
    profile.set_preference('browser.download.dir', os.getcwd())
    profile.set_preference('browser.helperApps.neverAsk.saveToDisk', 'application/xls')
    driver = webdriver.Firefox(profile)

    url = 'https://example.com/some_file.aspx'
    driver.get(url)
    driver.find_element_by_name("btnExportToExcel").click()
    driver.quit()


if __name__ == "__main__":
    main()