[BUG] Fresh install broken?

[javadan]

Describe your context

Fresh Raspbian install (Pi Zero W) Python 3.9

replace the result of pip list | grep dash below

dash                             2.6.1
dash-core-components             2.0.0
dash-html-components             2.0.0
dash-table                       5.0.0


Describe the bug

Fresh install, based on https://dash.plotly.com/installation
I save the first example "make your first Dash app!" to test.py


pip3 install dash

(python test.py)  - Error : Needs Pandas

pip3 install pandas

(python test.py)  - Error :   


File "pandas/_libs/interval.pyx", line 1, in init pandas._libs.interval
ValueError: numpy.ndarray size changed, may indicate binary incompatibility. Expected 48 from C header, got 40 from PyObject


pip3 install --upgrade numpy

(python test.py)  - Error :   

  File "/home/pi/.local/lib/python3.9/site-packages/_plotly_utils/basevalidators.py", line 2424, in data_class
    module = import_module(self.module_str)
  File "/usr/lib/python3.9/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
  File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 680, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 786, in exec_module
  File "<frozen importlib._bootstrap_external>", line 918, in get_code
  File "<frozen importlib._bootstrap_external>", line 587, in _compile_bytecode
ValueError: bad marshal data (unknown type code)

I give up.

Expected behavior

I expected the installation to go a bit smoother.

[T4rk1n]

Fresh Raspbian install (Pi Zero W)

This is an arm based machine, it needs specially compiled for packages that contains native code. You can try to use conda instead to install packages, that should have the pre-compiled packages for your system.

[javadan]

Ok thanks. Pivoted to Flask/d3.js for now, but will give that a shot next Plotly/Dash attempt.

[javadan]

Bummer. Last Conda for ARM6 was 2014. Python 2.

Do I have any other options?

[T4rk1n]

@javadan The platform you are looking for is aarch64, you can try this: https://repo.anaconda.com/miniconda/Miniconda3-py39_4.12.0-Linux-aarch64.sh

And all the miniconda distribution are located here: https://repo.anaconda.com/miniconda/

[T4rk1n]

The architecture name got merged back in 2014: https://www.phoronix.com/news/MTY5ODk

[javadan]

Unfortunately that's for ARM8 (64 bit).
Pi Zero W is ARM6 (32 bit.)

I doubt a 64 bit build will work.

Maybe it's possible to run a 64 bit OS on a 32 bit docker? Or compile from source?

[javadan]

Yup.

[javadan]

Unpacking payload ... ./Miniconda3-py39_4.12.0-Linux-aarch64.sh: 411: /home/pi/miniconda3/conda.exe: Exec format error

[javadan]

Docker idea no go.

Possible to compile from source?

[T4rk1n]

Not sure what compiling packages with armv6 would involve, would probably takes a long time on a pi zero.

There was https://github.com/jjhelmus/berryconda, but seems that project has died.