Is there any why to know the iloc of dropdown?

Dash Python
1

hi, I need to search in an np.array, and I’m using dropdowns, so, I need to know what is the possition of the array. Is there any way to know that?

2 
dcc.Dropdown(
   options=[
       {'label': 'New York City', 'value': 'New York City'},
       {'label': 'Montreal', 'value': 'Montreal'},
       {'label': 'San Francisco', 'value': 'San Francisco'},
   ],
   value='Montreal'
)

Label for idx/position, and value for option. Does this work for you?

3

sorry … I’ve explained wrongly … I meant number (index number)

4

You must encode the information you need (e.g. the index) as (part of) the value property, e.g.


dcc.Dropdown(
   options=[
       {'label': 'New York City', 'value': 0},  # value is the index
       {'label': 'Montreal', 'value': 1},  # value is the index
       {'label': 'San Francisco', 'value': 2},  # value is the index
   ],
   value=1  # select Montreal
)
5

and if I dont know the labels? (I’m changing of data a lot of times … I need to index without knowing labels