Django error - 'function' object has no attribute [closed]

I have following problem:
I would like to call a function vyroci_mesicV from a module vyroci in my view.py.
When I simply try print(vyroci.vyroci_mesicV()) in the terminal in VS Code I got the desired output. However, when I run py manage.py runserverand run the local host I got and error message AttributeError: 'function' object has no attribute 'vyroci_mesicV'

Here is the code of views.py if needed:

def vyroci(request):
    error_msg = None
    vysledek = None
    if request.method == "POST":
        if (request.POST["operator"] == "Vysehrad"):         
            vysledek = vyroci.vyroci_mesicV()
        else:
            error_msg = "something wrong :("
            return render(request, "vyroci/vyroci.html", dict(error_msg=error_msg, vysledek=vysledek))
    return render(request, "vyroci/vyroci.html", dict(error_msg=error_msg, vysledek=vysledek))

and here the vyroci.html if needed:

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
        <title>XXX</title>
</head>
<body>
    <form method="POST">
        {% csrf_token %}
        <span style="color: red;">{{error_msg}}</span>
        <br>
        <select name="operator">
            <option value="Vysehrad" {% if request.POST.operator == "Vysehrad" %} selected {% endif %}>VyŇ°ehrad</option>
        </select>
        <input type="submit"><br>
        {{vysledek}}
    </form>
</body>
</html>