# Interactivity between dependent dropdowns **URL:** \ **Category:** Dash Python\ **Created:** [October 4, 2017, 10:43pm UTC](https://community.plotly.com/t/interactivity-between-dependent-dropdowns/6096 "2017-10-04T22:43:02Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![nicolasescobar](https://avatars.discourse-cdn.com/v4/letter/n/ce73a5/32.png) [@nicolasescobar](https://community.plotly.com/u/nicolasescobar)\ **Post date:** [October 4, 2017, 10:43pm UTC](https://community.plotly.com/t/interactivity-between-dependent-dropdowns/6096/1 "2017-10-04T22:43:02Z")
Hi! I’m trying to use two dropdowns as a filter to my plotly graphs on Dash. How can I accomplish that the first dropdown (“_Region_”) changes the options in the second dropdown (“_City_”)? Another topic: Is it possible to create a _html.DataTable_ that changes when I use the dropdown filters? how? Thank you in advance for your help! ---
**Author:** ![chriddyp](https://sea2.discourse-cdn.com/flex024/user_avatar/community.plotly.com/chriddyp/32/16855_2.png) [@chriddyp](https://community.plotly.com/u/chriddyp)\ **Post date:** [October 5, 2017, 3:45am UTC](https://community.plotly.com/t/interactivity-between-dependent-dropdowns/6096/2 "2017-10-05T03:45:56Z")
> [@nicolasescobar](#): > > How can I accomplish that the first dropdown (“Region”) changes the options in the second dropdown (“City”)? I recommend taking a look through [Part 2. Basic Callbacks | Dash for Python Documentation | Plotly](https://plot.ly/dash/getting-started-part-2) (and the rest of the tutorials!) - The last example in that tutorial has an example where the countries radio items update the cities radio items. > [@nicolasescobar](#): > > Another topic: Is it possible to create a html.DataTable that changes when I use the dropdown filters? how? Here’s an example: [Display tables in Dash - #12 by chriddyp](https://community.plotly.com/t/display-tables-in-dash/4707/12)