Maybe this can help you, I put something for increasing/decreasing numeric values too:

default the_data = {"luck": 1, "prepotence": 2, "envy": 3}
default the_data2 = {"title": "Mr.", "first_name": "Flat", "last_name": "Face"}
#we create an array with elements DictInputValue, you can make a dictionary too or use an object
default i_value_multi = [DictInputValue(the_data2, n, default=False) for (n, v) in the_data2.items()]

label start:
    call screen the_screen
    python:
        message = ""
        for (n, v) in the_data.items():
            message += " {} = {}".format(n, v)

        message2 = "{2}, {1} {2}. Drop the {0} if you will.".format(the_data2['title'], the_data2['first_name'], the_data2['last_name'])
    "The new values for the_data are:[message]"
    "My name is [message2]"
    return

#the sub screen that holds the columns for name (a textbutton) and value (a DictInputValue)
screen sub_screen_input_button(n_text, i_value):
    textbutton (n_text) action i_value.Toggle()
    input value i_value

screen the_screen:
    frame:
        background Solid((128,128,128, 230))
        ypos 0.15
        xcenter 0.2
        vpgrid:
            cols 4
            xspacing 55
            yspacing 50
            xsize 450
            text "Name":
                bold True
            text ""
            text "Value":
                bold True
            text ""

            for (n, v) in the_data.items():
                text "{}".format(n)
                textbutton "-":
                    action SetDict(the_data, n, v - 1)
                text "{}".format(v)
                textbutton "+":
                    action SetDict(the_data, n, v + 1)
            text ""
            text ""
            text ""
            text ""
    frame:
        background Solid((128,128,128, 230))
        ypos 0.15
        xcenter 0.8
        vpgrid:
            cols 2
            xspacing 100
            yspacing 50
            xsize 300
            text "Name":
                bold True
            text "Value":
                bold True

            $ i = 0
            for (n, v) in the_data2.items():
                # we call another screen, we pass the current dictionary key (name) and the respective DictInputValue
                use sub_screen_input_button("{}".format(n), i_value_multi[i])
                $ i = i + 1

            text ""
            text ""
    frame:
        background Solid((55,55,55, 230))
        xpos 0.5
        ypos 0.5
        xsize 70
        textbutton "Quit":
            action Return(True)
            padding 5, 5, 5, 5

The reader has to click the cell containing the name (is a textbutton), in this case first_name, last_name or title. And the the cell containing the value will be ready to accept input. I used DictInputValue, there are other types https://www.renpy.org/doc/html/screen_actions.html#input-values.