Selenium in Python: Selecting an Option

Question

I am having no luck selecting an option from a <select> using selenium. I have referenced https://sqa.stackexchange.com/questions/1355/what-is-the-correct-way-to-select-an-option-using-seleniums-python-webdriver

The html code is as follows:

<select name="Dropdownlistrequests" onchange="javascript:setTimeout(&#39;__doPostBack(\&#39;Dropdownlistrequests\&#39;,\&#39;\&#39;)&#39;, 0)" id="Dropdownlistrequests" style="height:51px;width:174px;Z-INDEX: 104; LEFT: 280px; POSITION: absolute; TOP: 72px">
    <option selected="selected" value="1">Previous Days</option>
    <option value="2">Previous Month</option>
    <option value="3">Last 12 Hours</option>
    <option value="4">Demand Poll</option>
    <option value="6">Custom</option>
</select>

I have tried

requests = driver.find_element_by_id("Dropdownlistrequests")
requests.click()
for option in requests.find_elements_by_tag_name('option'):
    if option.text == "Custom":
        option.click()
        break

And

requests = Select(driver.find_element_by_id("Dropdownlistrequests"))
requests.select_by_value("6")

And

b.find_element_by_xpath("//select[@id='Dropdownlistrequests']/option[text()='Custom']").click()

Instead of selecting the appropriate option the browser does nothing and moves on to the next bit of code. Could it have something to do the the javascript that is triggered by the onchange?

To provide some more context: I am running windows 7 enterprise and using selenium with marionette and Firefox developer edition 49.0a2

Update: This only sems to happen when usoing Marionette in python. I tried this same code in Java with and without Marionette and it worked

Answer 1

If non of the work in your case you should try .execute_script() as below :-

select = driver.find_element_by_id("Dropdownlistrequests")

driver.execute_script("var select = arguments[0]; for(var i = 0; i < select.options.length; i++){ if(select.options[i].text == arguments[1]){ select.options[i].selected = true; } }",select, "Custom")

Edited :- Above code only select the provided option from select box. If you want trigger the onchange event as well when option selected, try as below :-

select = driver.find_element_by_id("Dropdownlistrequests")

driver.execute_script("showDropdown = function (element) {var event; event = document.createEvent('MouseEvents'); event.initMouseEvent('mousedown', true, true, window); element.dispatchEvent(event); }; showDropdown(arguments[0]);",select)
# now you dropdown will be open


driver.find_element_by_xpath("//select[@id='Dropdownlistrequests']/option[text()='Custom']").click()
#this will click the option which text is custom and onchange event will be triggered.

Hope it will work for you..:)