Scipy.io.mmread Throws Value Error in Streamlit Heroku App-CodePudding

I have been trying to read a scipy matrix file in my streamlit app. The app runs on local machine without any errors in app or console. While deployed on Heroku it raises ValueError: not enough values to unpack (expected 5, got 2) on the line co_occurrence_matrix = scipy.io.mmread("./database/matrix.mtx").

I've crosschecked the following points, and not sure where to look for the problem.

Matrix is created with

smatrix =  scipy.sparse.csr_matrix(matrix)
scipy.isspmatrix(smatrix) #-> returns True
scipy.io.mmwrite("./database/matrix.mtx\",smatrix)

All library versions including python itself are identical between the two apps. Both checked on consoles with pip list. And requirements file is created with pip freeze.
Files are synchronized on git, git status returns 'up to date. Heroku uses the file on git, the local app runs on the synchronized file.
If it makes any difference, the .mtx file is uploaded via git lfs.
Heroku deploys the app successfully, yet inside the streamlit app, it gives the error.

Full Error:

File "/app/.heroku/python/lib/python3.9/site-packages/streamlit/runtime/scriptrunner/script_runner.py", line 565, in _run_script
    exec(code, module.__dict__)File "/app/main.py", line 4, in <module>
    from gorsellestirme_util import set_bg, Plotter, matrix, word_list, main_dfFile "/app/gorsellestirme_util.py", line 30, in <module>
    matrix, word_list, main_df = matrix_reader()File "/app/.heroku/python/lib/python3.9/site-packages/streamlit/runtime/legacy_caching/caching.py", line 625, in wrapped_func
    return get_or_create_cached_value()File "/app/.heroku/python/lib/python3.9/site-packages/streamlit/runtime/legacy_caching/caching.py", line 609, in get_or_create_cached_value
    return_value = non_optional_func(*args, **kwargs)File "/app/gorsellestirme_util.py", line 12, in matrix_reader
    co_occurrence_matrix = mmread("./database/matrix.mtx")File "/app/.heroku/python/lib/python3.9/site-packages/scipy/io/_mmio.py", line 77, in mmread
    return MMFile().read(source)File "/app/.heroku/python/lib/python3.9/site-packages/scipy/io/_mmio.py", line 438, in read
    self._parse_header(stream)File "/app/.heroku/python/lib/python3.9/site-packages/scipy/io/_mmio.py", line 502, in _parse_header
    self.__class__.info(stream)File "/app/.heroku/python/lib/python3.9/site-packages/scipy/io/_mmio.py", line 234, in info
    mmid, matrix, format, field, symmetry = \

CodePudding user response：

As for the source of the problem: It is clearly stated in the Heroku docs that Heroku does not support git-lfs files. I've missed that point.

As a workaround, there are multiple build packs in Heroku elements. FYI, those buildpacks are also limited with Heroku's 500Mb filesize cap. And security has to be considered as an issue as those buildpacks require third-party access to your git.