# Browse buttons for file selection and progress bar

**URL:** <https://community.plotly.com/t/browse-buttons-for-file-selection-and-progress-bar/35851>\
**Category:** Dash Python\
**Created:** [March 5, 2020, 11:26am UTC](https://community.plotly.com/t/browse-buttons-for-file-selection-and-progress-bar/35851 "2020-03-05T11:26:19Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![kilobit](https://avatars.discourse-cdn.com/v4/letter/k/4da419/32.png) [@kilobit](https://community.plotly.com/u/kilobit)\
**Post date:** [March 5, 2020, 11:26am UTC](https://community.plotly.com/t/browse-buttons-for-file-selection-and-progress-bar/35851/1 "2020-03-05T11:26:19Z")

</div>

Hello,

I want to create web app in dash, to do some data analysis of two files,  
EDIT :1st question:  
_1. i know that i can use dcc.Update() to open file , but how can i store it to variable ?_

1. i want to show the progress of this file danalysis, do you have any example of status bars? example:  
1 of X rows has been analyzed, and bar with percentage shown.

Thanks in advice  
K.