I want to uninstall Python3 and just use 2.7

Question

Following is my cascasde dropdown list query. Countries list loading up but non of the states loading up in my dropdown list. if someone can help me to rectify the query please.

        public ActionResult CountryList()
        {

            var countries = db.Countries.OrderBy(x=>x.CountryName).ToList(); 
        //    IQueryable countries = Country.GetCountries();

            if (HttpContext.Request.IsAjaxRequest())
            {
                return Json(new SelectList(
                            countries,
                            "CountryID",
                            "CountryName"), JsonRequestBehavior.AllowGet
                            );
            }

            return View(countries);
        }

        public ActionResult StateList(int CountryID)
        {
            IQueryable <State> states= db.States. Where(x => x.CountryID == CountryID);

            if (HttpContext.Request.IsAjaxRequest())
                return Json(new SelectList(
                                states,
                                "StateID",
                                "StateName"), JsonRequestBehavior.AllowGet
                            );

            return View(states);
        }

following is the View file also containg java script:

@section scripts {
    <script type="text/javascript">
        $(function () {
            $.getJSON("/Dropdown/Countries/List",function (data) {
                var items = "<option>---------------------</option>";
                $.each(data, function (i, country) {
                    items += "<option value='" + country.Value + "'>" + country.Text + "</option>";
                });
                $("#Countries").html(items);
            });

            $("#Countries").change(function () {
                $.getJSON("/Dropdown/States/List/" + $("#Countries > option:selected").attr("value"), function (data) {
                    var items = "<option>---------------------</option>";
                    $.each(data, function (i, state) {
                        items += "<option value='" + state.Value + "'>" + state.Text + "</option>";
                    });
                    $("#States").html(items);
                });
            });
        });
    </script>
}

<h1>@ViewBag.Title</h1>

@using (Html.BeginForm())
{
    <label for="Countries">Countries</label>
    <select id="Countries" name="Countries"></select>
    <br /><br />
    <label for="States">States</label>
    <select id="States" name="States"></select>
    <br /><br />
    <input type="submit" value="Submit" />
}

Solution

The problem is with what is called dependencies.

Those apps depend on "python3" being installed to function properly.

You can still install any other version of python you want, but will need to specifically call that version at the command-line.

Comments

[dobey]

Why? If you want to use 2.7 for your own code, use /usr/bin/python, though you should really be writing new code with python3.

[dobey]

Yes, it is widely used. That should be pretty obvious from the apt-get remove suggesting other dependencies to be removed.

[serhiyb]

Can you also include your javascript code that execute ajax calls?

[Marlon Vidal]

Call .ToList() method on your states object

[mudassir sheikh]

IQueryable <State> states= db.States. Where(x => x.CountryID == CountryID).ToList(); ...... this code showing red line

[Oluwafemi]

What stops you from using $('#Countries').val();?

[Developer]

When you call .ToList(), that is not IQueryable, thats gonna be IEnumerable. Just use var states=

[SDsolar]

It is not used here. All it does is take up the limited space on my systems and backups.

[dobey]

@SDsolar Core parts of Ubuntu do require python3. If you wish to remove things and understand what you're doing, then do it. I'm not sure why you made such comments on this nearly 4 year old question.

[SDsolar]

Google doesn't notice the age when it puts one of these questions at the top of the list when I search. Meanwhile, I have decided to leave it be. TNX.

[UnworthyToast]

Makes sense. I could swear that those apps (like rhythmbox, firefox, etc) were all installed prior to my Python3 install though, when I only had the default Python 2.7.5+ pre-installed.

[UnworthyToast]

I have both 2.7 and 3 installed. I know it may not make sense to uninstall 3, it's for curiosity somewhat at this point. I can't remember why I originally wanted to. I guess I thought it was messing something on the OS up haha.

[dobey]

@virtualxtc That's not exactly true. Rhythmbox depends on python >= 2.7 (but 3.0 does not satisfy that, as the package name is not python).

[virtualxtc]

@dobey I think what you meant to say was: "Rhythmbox depends on python >= 2.7 (but 2.7 does not satisfy that, as the package name is not python) - and thanks; I hadn't considered that.

[dobey]

@virtualxtc No, I meant what I said. python is only available as python 2.x. The python 3.x package is python3. Rhythmbox in <= 13.10 cannot be installed without python 2.7 (in the default archive packages).

[virtualxtc]

Ok, so now I'm confused as to whether UnworthyToast's question was answered. If Rhythmbox depends on "python" >= 2.7, why using apt to remove "python3" cause it to also remove Rhythmbox? UnworthyToast - Did you have python 2.7 installed when you ran the "apt-get remove python3" command?

[SDsolar]

I know why I want to remove it - My Raspbian systems run from 32GB SD cards. My Ubuntu 16.04 LTS systems run on 160 GB SSD drives. It takes up a lot of space on the primary drives and in every backup. And I never use it on purpose.

[virtualxtc]

@dobey @SDsolar According to the dependency list rhythmbox depends on python3 not python

[dobey]

@virtualxtc Yes. And in the nearly 4 years since the previous commentary on this question, many packaging bugs have likely been resolved, and dependencies have further changed.