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Trying to install a program and got an error asking a Python version that is already installed, and also a pip error

As the title says, I am trying to install a program that has a couple of dependecies that demand a specific Python version (>= 3.7). I do not have admin rights, so I can't use sudo. The Python version installed is 2.7. Because of that, I used virtualenv to install and execute Python 3.9.5.
I executed venv, and checked the Python and pip versions:
which python
/home/honda/venv_python-3.9.5/bin/python
which pip
/home/honda/venv_python-3.9.5/bin/pip
I even checked the version using:
python
Python 3.9.5 (default, May 10 2021, 13:50:25)
Which, as I understand, means that I have the correct Python/pip versions.
However, when I try to install the program, I get this:
./install.sh ../Programs/
Installing darwin binary...
Installing oma...
Installing libraries...
creating virtualenv for hog_bottom_up
Collecting numpy (from -r ../Programs//OMA/OMA.2.4.2/hog_bottom_up/requirements.txt (line 1))
Using cached https://files.pythonhosted.org/packages/f3/1f/fe9459e39335e7d0e372b5e5dcd60f4381d3d1b42f0b9c8222102ff29ded/numpy-1.20.3.zip
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/tmp/pip-build-3_2_atp3/numpy/setup.py", line 30, in <module>
raise RuntimeError("Python version >= 3.7 required.")
RuntimeError: Python version >= 3.7 required.
----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-3_2_atp3/numpy/
You are using pip version 8.1.1, however version 21.1.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
Cannot install python dependencies for hog-bottom-up inference algorithm
cannot create virtual environment for hog_bottom_up
To be honest, I don't know what is happening here. Is there something I am missing? I am not experienced in using virtualenv (I previously used another computer, one that I could use sudo, so I never had any problems like this, and I did install this same program there.)
Is there anything I can try? I guess could reach out to the admin and ask them to install the program for me, but I'd rather not do that yet.
Thank you!

can not install Ropper with pip on Linux

I am trying to write some script which requires ropper. (install only via pip)
How can i fix this problem?
I am trying to install it on linux, tried to upgrade setuptools, install old version and followed this, only one topic, which i found:
the link!
This is the error message:
$ pip install ropper
DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7.
Collecting ropper
Using cached https://files.pythonhosted.org/packages/94/b1/922dfab5083ff439ce70358c7f3e49185c54e6ea6ee2bb7cd292e63eac06/ropper-1.12.1.tar.gz
Collecting filebytes>=0.9.18 (from ropper)
Using cached https://files.pythonhosted.org/packages/0b/3a/9fc0c62bd74583137a8bbc3c8020d6a8234b9cf8bc1e99fe929688b19093/filebytes-0.9.20.tar.gz
ERROR: Complete output from command python setup.py egg_info:
ERROR: Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/tmp/pip-install-d44HeD/filebytes/setup.py", line 3, in <module>
from pathlib import Path
ImportError: No module named pathlib
----------------------------------------
ERROR: Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-install-d44HeD/filebytes/

filebytes==0.9.20 release is not compatible with Python 2; the package maintainer already fixed this, but the new version is not yet uploaded to PyPI. Restrict filebytes to previous version for now:
$ pip install "filebytes<0.9.20" ropper
Once next version (0.9.21) is released, you can update it if you want:
$ pip install --upgrade "filebytes>0.9.20"

Jnius installation bug, "Unable to determine JDK_HOME"

I tried to install jnius Python module by typing 'pip install jnius' in CMD.
This is the message I got:
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "c:\users\sm\appdata\local\temp\pip-install-vu2sb5\jnius\setup.py", line 111, in <module>
raise Exception('Unable to determine JDK_HOME')
Exception: Unable to determine JDK_HOME
----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in
c:\users\sm\appdata\local\temp\pip-install-vu2sb5\jnius\
I restarted CMD, but it didn't help.

I have finally resolved it. I have installed Cython before this happened and I installed both Java JDK and JRE after #Chris comment. And I have also added JAVA_HOME and JDK_HOME to system variables.Thank you #Chris, but it didn't resolve problem completely.
Then I got another error message. There was written that I have to install Microsoft Visual C++ Compiler for Python 2.7 from this page:
https://www.microsoft.com/en-us/download/confirmation.aspx?id=44266
After that I tried to install jnius again but the error message said that permission is denied so I ran CMD as administrator and finally installed jnius by typing pip install jnius.
I spent a lot of time to resolve it and hope that it will help everyone with same or similar problem.

I have resolved the problem in windows os.
1st step:
I have installed cython by using pip install cython
C:\Users>pip install cython
Collecting cython
Downloading Cython-0.29.22-cp38-cp38-win_amd64.whl (1.7 MB)
|████████████████████████████████| 1.7 MB 1.3 MB/s
Installing collected packages: cython
Successfully installed cython-0.29.22
2nd step:
I have installed jnius by using pip install pyjnius command
C:\Users>pip install pyjnius
Collecting pyjnius
Downloading pyjnius-1.3.0-cp38-cp38-win_amd64.whl (226 kB)
|████████████████████████████████| 226 kB 3.2 MB/s
Requirement already satisfied: cython in c:\users\sss\appdata\local\programs\python\python38\lib\site-packages (from pyjnius) (0.29.22)
Requirement already satisfied: six>=1.7.0 in c:\users\sss\appdata\local\programs\python\python38\lib\site-packages (from pyjnius) (1.15.0)
Installing collected packages: pyjnius
Successfully installed pyjnius-1.3.0
I hope this solves your problem.

The thing that worked for me was simply adding JAVA_HOME and JDK_HOME variables.

pip Installing a python module in Python 3, but that module has a dependency package that requires Python 2

so I am new to Python and what is a good way to learn it is to do some personal project :) So I am on my Windows and using virtualenv to contain environment
So, I need to use the Scrappy module:
pip install scrappy
Collecting scrappy
Using cached Scrappy-0.3.0.alpha.4.tar.gz
Collecting guessit (from scrappy)
Using cached guessit-2.1.4.tar.gz
Collecting tvdb_api (from scrappy)
Using cached tvdb_api-2.0.tar.gz
Collecting hachoir-metadata (from scrappy)
Using cached hachoir-metadata-1.3.3.tar.gz
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "C:\Users\USERPH\AppData\Local\Temp\pip-build-__zp7zbj\hachoir-metadata\setup.py", line 65
except OSError, err:
^
SyntaxError: invalid syntax
----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in C:\Users\USERPH\AppData\Local\Temp\pip-build-__zp7zbj\h
achoir-metadata\
Its because hachoir-metadata is a Python2 dependent package, so I tried installing their Python 3 version
pip install hachoir3
I confirmed that it was installed using
pip list | Select-String hachoir3
so I tried running
pip install scrappy again
but same error.
Any work around to install scrappy? I cannot go down to Python 2.
Thanks!

Scrappy itself contains code that only works in Python 2. I.e. Scrappy cannot be used with Python 3+.

Unable to resolve dependencies for the Python OCR Library pypdfocr [duplicate]

This question already has answers here:
Cannot install modules via pip running on python 3.4
(2 answers)
Closed 6 years ago.
I have tried installing pypdfocr using the commands:
pip install pypdfocr
pip install -i https://pypi.anaconda.org/pypi/simple pypdfocr
but I am continuously getting the error message:
File "C:\Users\888537\AppData\Local\Temp\pip-build-b4mwr93n\evernote\setup
.py", line 6
exec x
^
SyntaxError: Missing parentheses in call to 'exec'
----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in C:\Users\888537\A
ppData\Local\Temp\pip-build-b4mwr93n\evernote\
The following is the log of installation:
[Anaconda3] C:\Users\888537>pip install -i https://pypi.anaconda.org/pypi/simple
pypdfocr
Collecting pypdfocr
Downloading https://pypi.anaconda.org/pypi/simple/pypdfocr/0.7.6/pypdfocr-0.7.
6.tar.gz
Requirement already satisfied (use --upgrade to upgrade): pillow>=2.2 in d:\anac
onda3\lib\site-packages (from pypdfocr)
Requirement already satisfied (use --upgrade to upgrade): reportlab>=2.7 in d:\a
naconda3\lib\site-packages (from pypdfocr)
Collecting watchdog>=0.6.0 (from pypdfocr)
Downloading https://pypi.anaconda.org/pypi/simple/watchdog/0.8.1/watchdog-0.8.
1.tar.gz (154kB)
100% |################################| 163kB 52kB/s
Requirement already satisfied (use --upgrade to upgrade): pypdf2>=1.23 in d:\ana
conda3\lib\site-packages (from pypdfocr)
Collecting evernote (from pypdfocr)
Downloading https://pypi.anaconda.org/pypi/simple/evernote/1.25.0/evernote-1.2
5.0.tar.gz (140kB)
100% |################################| 143kB 187kB/s
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "C:\Users\888537\AppData\Local\Temp\pip-build-b4mwr93n\evernote\setup
.py", line 6
exec x
^
SyntaxError: Missing parentheses in call to 'exec'
----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in C:\Users\888537\A
ppData\Local\Temp\pip-build-b4mwr93n\evernote\
How can I rectify this installation problem with pypdfocr library?

Use Python 2.x instead of 3.x or find the line where syntax error occurs and add the parenthesis.
See, in Python 3 exec is a function, but in Python 2 exec is a command.
So in Python 3, you have to put arguments into parenthesis to make a call to exec() properly.
So, you're trying to install the package to Python3 that is meant for Python 2.
At least installation script is.
OK, that is what I can deduce from that error log. I am not familiar with PyPDFOCR, although I Suspect it uses tesseract for OCRing, and probably PDFMiner to access images from a PDF document.
To continue using PIP, first download, not install, the package, then change setup.py, then do python setup.py install.
Although, if a script is for Python 2, it may be that the package in question is meant only for Python 2. Because pip should automatically choose the correct package version for installed Python.
All the mess may have something to do with the Anaconda distro.
Good luck.