How can I get value from dcc.Input from current to use it for the calculation on the other page?

[junior]

dcc.Store and “hidden” html.Div don’t work as I need to calculate 200+ rows based on Input number. Global variable is not recommended. Is any other way to store client’s input (or callback return)? Many thanks

[Eduardo]

Hi Junior,
Check if this could work for your need:

Show and tell: Super-fast way to share data between callbacks: Apache Plasma in-memory object store

I’ve been following the Arrow project and have messed around a bit with Apache Plasma as a shared-memory data backend. Has anyone else used this? It provides incredible performance boosts compared to reading large data from disk, caching large objects, or other things. I was reading things in for each callback with Parquet (which is already fast) and experienced write speedups of about 5x and read speedups of 10-50x because though there is serialization, it’s all in memory. Docs: https://arrow.…

[junior]

Hi Eduardo,

Thank you so much for the link shared. For sure it would accelerate calculation process. Plasma can help to share date between two callbacks or within Pandas.

@app.callback(
Output(component_id=‘my-output’, component_property=‘children’),
[Input(component_id=‘my-input’, component_property=‘value’)])
def update_output_div(input_value):
return ‘Output: {}’.format(input_value)

But I still have no idea how to get input_value from callback and use it for computing either in Plasma+Pandas or in Pandas itself. In any try I got resolution ‘input_value does not defined at module level’ or ‘Unresolved reference input_value’.