Streamlit button to load a file

uploaded_file = st.file_uploader("Choose a file")
if uploaded_file is not None:
     # To read file as bytes:
     bytes_data = uploaded_file.getvalue()
     st.write(bytes_data)

     # To convert to a string based IO:
     stringio = StringIO(uploaded_file.getvalue().decode("utf-8"))
     st.write(stringio)

     # To read file as string:
     string_data = stringio.read()
     st.write(string_data)

     # Can be used wherever a "file-like" object is accepted:
     dataframe = pd.read_csv(uploaded_file)
     st.write(dataframe)

Source: google.com

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