How to use a variable as the input for a form field in Google Colaboratory?

Question

The official example shows how to use Form Fields in Google Colaboratory: https://colab.research.google.com/notebooks/forms.ipynb.

Let's say we have a list: fruit_list = ['apples', 'bananas', 'mangoes']

Now I would like to add the elements of this list as a dropdown in the Form:

#@title # Select Your Choice of Fruit
fruit_selected = 'apples' #@params fruit_list {input: string}

As of now I can think of some hacks like this one:

#@title Boolean fields { run: "auto", vertical-output: true }
this_list = ["False", "True"]
boolean_checkbox = False #@param {type:"boolean"}
boolean_dropdown_asis = False #@param ["False", "True"] {type:"raw"}
boolean_dropdown_var = this_list[1] #@param {type:"raw"}

print(boolean_checkbox)
print(boolean_dropdown_asis)
print(boolean_dropdown_var)

But I would prefer to have another type of input: variable instead of just raw/string. The final implementation could be like this:

#@title # Select Your Choice of Fruit
fruit_list = ['apples', 'bananas', 'mangoes']
fruit_selected = 'apples' #@params fruit_list {input: variable}

I worked on some OVERKILL. You are free to look at it. Comments are welcome! :)

Anyone, any better idea?

Notes: There is another stackoverflow discussion where Sergio Lucero raised a similar question. But the main thread has a different question.

Answer 1

If you use the widget like in the notebook of blois, you can use the following code to call the value:

fruit_picker.value

This will return the value of your chosen fruit.

The code in total will look like this:

import ipywidgets as widgets
fruit_list = ['pomegranate', 'watermelon', 'lychee']
fruit_picker = widgets.Dropdown(options=fruit_list, value='watermelon')

fruit_picker

fruit_picker.value