Streamlit.share.io fails to find local file - FileNotFoundError: [Errno 2] No such file or directory. -- Works in local mode

[AHFOT]

Hello all,
when deploying my app on streamlit.share.io, i’m having a classic FileNotFoundError: [Errno 2] No such file or directory.

I am sure of the path (tested it directly from the log file generated). This is strange since, when I’m using the app in standalone mode, it works perfectly as I want. I’ve tried multiple workaround found here on the forum, but for the life of me, I can’t get it to work. I join in attachement the screenshot of what I get. The app itself is running, but i get the error when I copy/past the path of the folder where my file is contained (without the filename, but I tried also with the file name, still fails), it get the error message in the picture. I’ll also join my code. It is part of a multipage app so no worries about the def app() stuff, it’s getting called somewhere else and there is no issue with that. The file is a .log file, but it’s not the cause of the problem either.

At some point, I thought it was the \ vs \ problem with the path, but it appears it is not (maybe yes, but I don’t think so, since I’ve tried a direct raw string or normal string and it works in standalone mode).

Does anyone have any idea?
Edit: the error message is giving a slightly different function name, because it’s from some troubleshooting, but the result is absolutely the same with what I copied here.

import plotly.graph_objects as go
import re
import os
import streamlit as st


###########################################
###########################################
###           Start & styling           ###
###########################################
###########################################

def app():
    
    
    oc_id = 'some text '
    install_oc = 'some text too'

    ###########################################
    ###########################################
    ###           File selector             ###
    ###########################################
    ###########################################

    def file_selector(folder_path):

         filenames = [os.path.abspath(os.path.join(folder_path, _)) for _ in os.listdir(folder_path) if _.endswith(".log")]
        selected_filename = st.selectbox('Select a file', filenames)
         st.write('You selected `%s`' % selected_filename)
        return os.path.join(selected_filename)

    file_input = st.text_input("Copy your file path here", placeholder="C:/")

    if len(file_input)==0 :
        st.warning("No file selected!")
    else:
        file = file_selector(str(file_input))

[Franky1]

You cannot access files on your local computer in this way if you run the streamlit app on streamlit cloud. This does not work and is a conceptual misunderstanding. Think about it, where does this python app run, it runs on the server and there is no C: drive.

[AHFOT]

Yes, it makes sense indeed. Then how could I do it? The file_uploader widget does not work for this kind of files.

[Franky1]

@AHFOT

The file_uploader widget does not work for this kind of files.

Why not? What kind of files?

[AHFOT]

my file is a “.log” file. Maybe I’m not doing it correctly, but I cannot make it work for this extension

[Franky1]

Sure this should work. Unless your log file is very large in the hundreds of megabytes or beyond.

[AHFOT]

Hundreds, no. But usually around 60mb yes.

[Franky1]

@AHFOT

But usually around 60mb yes.

Should be no problem at all.

[AHFOT]

ok but then how do you read such a file? Because a “with open(…) as f:” classic way, I’m struggling a lot. I have other pages where I use the file_uploader widget without problems for a csv file, but for my log file, I’m stuck.

[Franky1]

@AHFOT

but for my log file, I’m stuck.

What is the difference? Where is the problem?

st.file_uploader - Streamlit Docs

[AHFOT]

always had this usual error : TypeError: expected str, bytes or os.PathLike object, not _io.BytesIO

I can’t seem to open it as a str or bytes file, like i can for a csv

[Franky1]

Can you provide a code example, that has not worked for you?

[AHFOT]

Sure, thanks a lot for all the help!
What’s currently uncommented (with the open()…) does not work and returns an error “TypeError: expected str, bytes or os.PathLike object, not UploadedFile”.

I also tried the commented line above instead (with, of course, commenting the open() )) but then my line containing 'if string_to_search in line:" is messed up with types as well. It’s probably simpler than I think, I’m probably noze-dived in it for too long today.

ifile = st.file_uploader("Upload your log file here!", type=".log", accept_multiple_files=False)
        line_number = 0
        list_of_results = []
        ifile=ifile
        if ifile is not None:
            #f = ifile.readlines()
            with open(ifile, "rb") as f:
            # Read all lines in the file one by one
                for line in f:
                    # For each line, check if line contains the string
                    line_number += 1
                    if string_to_search in line:
                        # If yes, then add the line number & line as a tuple in the list
                        if octype == "actual":
                            line = line.replace(line[24:79], '')  # to remove the timestamp of file creation (not the event timestamp)
                            list_of_results.append(line.replace(oc_id, ''))
                        else:
                            line = line.replace(line[0:120], "")
                            list_of_results.append(line.replace(install_oc, " "))
        # Return list of tuples containing line numbers and lines where string is found
        return list_of_results

[Franky1]

This is one possible solution:

uploaded_file = st.file_uploader("Upload your log file here!", type=".log", accept_multiple_files=False)
if uploaded_file is not None:
    lines = uploaded_file.readlines()
    for line in lines:
        print(line.decode("utf-8").strip())