How to check if a sidebar checkbox is clicked in streamlit app

Question

I wrote the code as follows to create checkboxes for streamlit app in a for loop. How can I develop the code to check weather a box is clicked or not? I did it in the following way but it doesn't work in this way.

#I created data frame called df in another function.

names = ["df1","df2"]

def create_checkboxes (names :List[str], df):
  checkboxes = {}
  for name in names:
     checkboxes[name] = st.sidebar.checkbox(name, key=name, value=True)


  dfs = []
  for key, value in checkboxes.items():
      checkboxes[key] == "df1"
      dfs.append(df_list[0])
      checkboxes[key] == "df2"
      dfs.append(df_list[1])

   if len(dfs) > 1:
      df = pd.concat(dfs)

return df, checkboxes

Answer 1

You can try this approach, using an if condition.
First set the checkboxex value to False, but you can still keep it as True if you want:

checkboxes[name] = st.sidebar.checkbox(name, key=name, value=False)

Refactor the loop to:

...
dfs = []
for key, value in checkboxes.items():
    if value:
        dfs.append(df[key])

if len(dfs) > 1:
    df = pd.concat(dfs)
...