Error when installing Prophet in docker image

I am trying to install prophet, yet (only when trying to docker build by image) the following error is thrown:

19.18 Collecting ujson (from cmdstanpy==0.9.68->prophet)
19.57   Downloading https://files.pythonhosted.org/packages/21/93/ba928551a83251be01f673755819f95a568cda0bfb9e0859be80086dce93/ujson-4.3.0.tar.gz (7.1MB)
23.28     Complete output from command python setup.py egg_info:
23.28     Traceback (most recent call last):
23.28       File "<string>", line 1, in <module>
23.28       File "/tmp/pip-build-hzpc95u_/ujson/setup.py", line 38, in <module>
23.28         "write_to_template": version_template,
23.28       File "/usr/lib/python3/dist-packages/setuptools/__init__.py", line 129, in setup
23.28         return distutils.core.setup(**attrs)
23.28       File "/usr/lib/python3.6/distutils/core.py", line 108, in setup
23.28         _setup_distribution = dist = klass(attrs)
23.28       File "/usr/lib/python3/dist-packages/setuptools/dist.py", line 372, in __init__
23.28         _Distribution.__init__(self, attrs)
23.28       File "/usr/lib/python3.6/distutils/dist.py", line 281, in __init__
23.28         self.finalize_options()
23.28       File "/usr/lib/python3/dist-packages/setuptools/dist.py", line 528, in finalize_options
23.28         ep.load()(self, ep.name, value)
23.28       File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2324, in load
23.28         return self.resolve()
23.28       File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2330, in resolve
23.28         module = __import__(self.module_name, fromlist=['__name__'], level=0)
23.28       File "/tmp/pip-build-hzpc95u_/ujson/.eggs/setuptools_scm-7.1.0-py3.6.egg/setuptools_scm/__init__.py", line 5
23.28         from __future__ import annotations
23.28         ^
23.28     SyntaxError: future feature annotations is not defined
23.28     
23.28     ----------------------------------------
23.69 Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-hzpc95u_/ujson/
------
failed to solve: process "/bin/sh -c python3 -m pip install prophet" did not complete successfully: exit code: 1

The above issue does not appear on my local execution. I have installed prophet using the pip install prophet command and everything works properly. The issue arises only when trying to create the Docker image.

The Dockerfile I use is the following:

FROM ubuntu:18.04
RUN apt-get update
# To avoid the questions related to the geographic area
RUN ln -snf /usr/share/zoneinfo/$CONTAINER_TIMEZONE /etc/localtime && echo $CONTAINER_TIMEZONE > /etc/timezone

RUN apt-get install -y python3.10 python3-pip
RUN pip3 install flask pandas numpy cython
RUN python3 -m pip install prophet

COPY app.py app.py
COPY checks.py checks.py
COPY predict.py predict.py

EXPOSE 5000

CMD ["python3", "-u", "app.py"]

I've tried also to install ujson and then try to install prophet. The ujson is installed yet afterwards the same issue arises.

The error because you're using an old version of the import of __future__ annotations as shown here https://peps.python.org/pep-0563/#enabling-the-future-behavior-in-python-3-7.

Since you're using Python10, try to upgrade pip, so your Dockerfile becomes:

FROM ubuntu:18.04
...
RUN apt-get install -y python3.10 python3-pip
RUN pip3 install --upgrade pip
RUN pip3 install flask pandas numpy cython prophet
...