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PyInstaller SSL error with requests module - missing module ssl (_ssl)

In my python script, I use the requests module to call an API to GET and POST data.
Python environment: anaconda3, python 3.7 / packages: requests 2.24.0, pyinstaller 3.6, openssl 1.1.1h...
I have the following problem with the EXE-file generated by PyInstaller: When I run this file, I get the following error message. This error doesn't occur when I run my script from Python:
Traceback (most recent call last):
File "site-packages\PyInstaller\loader\rthooks\pyi_rth_certifi.py", line 13, in <module>
File "c:\programdata\anaconda3\envs\...\lib\site-packages\PyInstaller\loader\pyimod03_importers.py", line 623, in exec_module
File "ssl.py", line 98, in <module>
ImportError: DLL load failed: The specified module could not be found.
[20188] Failed to execute script pyi_rth_certifi
If I follow to the excepted error lines (ssl.py):
import _ssl # if we can't import it, let the error propagate
Why can't ssl be imported?
I searched a long time in serveral post on SO but all these answers didn't help, ex.:
Python Requests throwing SSLError
Python Requests - How to use system ca-certificates (debian/ubuntu)?
Twilio Python Module Errors After Compiling
Fixing SSL certificate error in exe compiled with py2exe (or PyInstaller)
Does anyone have an idea how to fix this?
If you need more informations, please write a comment. THX
EDIT: (for Mooncrater's comment)
added Screenshot from python console, entered:
import _ssl
EDIT 2:
Tested "FIX" from SO Question:
Python SSL Import Error in PyInstaller generated executable
-> this didn't fix my problem
EDIT 3: Answer by cbolwerk
THX for your answer, this works!
Python 3.7 anaconda environment - import _ssl DLL load fail error
An additional fix is to install the latest OpenSSL Lib, I used 1.1.1h package in my python script, on my PC was installed an older version and that causes the error too.
cbolwerk's answer I tested on a PC where NO OpenSSL is installed and , as I wrote, it works!

If you can import ssl in the python within your environment, it means that the ssl module is probably inside your environment. This answer mentions the files you can look for inside your environment. They are either inside your env/Library/bin or env/DLLs. I think you have these installed, but pyinstaller doesn't recognize them. To make sure that pyinstaller knows these files, you can add them to datas. This can be edited in the command when building the .exe file or in the .spec file that is probably created when you have run this command once. This link may be useful there.
In short, add the paths of the DLLs I mentioned to the datas (or binaries inside .spec actually) so that they are recognized by pyinstaller.
So either run the command
pyinstaller --onedir --add-data libcrypto-1_1-x64.dll;. --add-data libssl-1_1-x64.dll;. myscript.py
or change your .spec to something like
datas = [('/path/to/libcrypto-1_1-x64.dll', '.'), ('/path/to/libssl-1_1-x64.dll', '.'),
(...) ]
...
a = Analysis(...,
datas=datas,
...)
...
and then run
pyinstaller --onedir myscript.spec
This fixed DLL issues for me at least.

How to alter setup.py for CyIPOPT

I want to install the python package CyIpopt (https://github.com/matthias-k/cyipopt) on windows 10 and python version 3.5.2. For the binary I am using http://www.coin-or.org/Binaries/Ipopt/Ipopt-3.10.1-Win32-Win64-dll.7z (which I unpacked). The github page gives install instructions. At one point it says:
Download the source files of cyipopt and update setup.py to point to the header files and binaries of the Ipopt package, if LD_LIBRARY_PATH and pkg_config are not setup to find ipopt on their own.
I downloaded the source files from github and edited the setup.py file by altering lines 33-36 to :
IPOPT_ICLUDE_DIRS=['D:\...\Ipopt-3.10.1-Win32-Win64-dll\include\coin', np.get_include()]
IPOPT_LIBS=['IpOptFSS','IpOpt-vc10','IpOpt-vc8']
IPOPT_LIB_DIRS=['D:\...\Ipopt-3.10.1-Win32-Win64-dll\lib\\x64\Release MKL']
IPOPT_DLL=['IpOptFSS.dll','IpOpt-vc10.dll','IpOpt-vc8.dll']
The dots represent the path to these folders on my computer. Now when I run python setup.py install, it run succesfuly. However when I then run python and import ipopt I get the following error:
Traceback (most recent call last):
File "", line 1, in
File "C:\Users\Linthorst\Miniconda3\lib\site-packages\ipopt-0.1.6-py3.5-win-amd64.egg\ipopt__init__.py", line 40, in
from cyipopt import *
ImportError: No module named 'cyipopt'
I suspect I altered the setup.py file incorrectly (since I made an educated guess). I am confused that it installed but doesn't work. Can anybody help me solve this error? Many thanks in advance

Error installing pyflycapture2 on Windows

I am attempting to install this https://github.com/jordens/pyflycapture2 python binding on my Windows machine. The readme only has instructions on how to do it for Linux systems, but I imagine the library should still work.
I am able to run "python setup.py install" and it seems to successfully complete, but when I try to run "python test_flycapture2.py" I get this error:
C:\Users\clinic\Desktop\pyflycapture2>python test_flycapture2.py Traceback (most recent call last):
File "test_flycapture2.py", line 20, in <module>
import flycapture2 as fc2
File "build\bdist.win-amd64\egg\flycapture2.py", line 7, in <module>
File "build\bdist.win-amd64\egg\flycapture2.py", line 6, in __bootstrap__
ImportError: DLL load failed: The specified module could not be found.
This seems to imply that flycapture2 wasn't installed correctly. When I instead just open a python session and do "import flycapture2" I get the following error:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "build\bdist.win-amd64\egg\flycapture2.py", line 7, in <module>
File "build\bdist.win-amd64\egg\flycapture2.py", line 6, in __bootstrap__
ImportError: DLL load failed: The specified module could not be found.
Have I done something wrong with the installation process or does pyflycapture2 just not work with Windows?

A dumb solution that's worth a try. There are chances that the DLL are searched directly from where you're starting the python script. So if you have the dll somewhere on your computer, copy it along where you have your test_flycapture2.py.
But given the fact that the setup.py file has a whole bunch of absolute paths in there, I would not place my hopes too high. You can also try to install FlyCapture 2 at the exact same path, run python setup.py bdist_wheel (you will need to install wheel first with pip) in the pyflycapture2 folder, and see if that succeeds.
If it does, try installing the generated wheel (that will be in dist/ subfolder) by doing pip install dist/pyfly....wheel and test again.
Hope this helps

I'm answering this mostly because I found another post where the same question had been posted but the original problem was never answered.
How do I run an installed Python module on Windows?
In the comments, the original poster says that it suddenly started working. I found that the solution was simply to restart my computer. I have now attempted this on two computers and this worked for both of them.

Struggling with making a Python module accessible via PyPi

I wrote a simple Python interface for working with the Pushwoosh notification service a while back, which is at https://github.com/Astutech/Pushwoosh-Python-library and I've finally gotten around to publishing it so it can be installed using Pip. This is the first time I've published a Python library to PyPi and I'm in a bit of a muddle.
Trying to install it brings up the following error:
Collecting pushwoosh
Using cached pushwoosh-1.0.0.tar.gz
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
File "<string>", line 20, in <module>
File "/tmp/pip-build-5m3jj7uu/pushwoosh/setup.py", line 17, in <module>
with open(path.join(here, 'DESCRIPTION.rst'), encoding='utf-8') as f:
File "/usr/lib/python3.4/codecs.py", line 896, in open
file = builtins.open(filename, mode, buffering)
FileNotFoundError: [Errno 2] No such file or directory: '/tmp/pip-build-5m3jj7uu/pushwoosh/DESCRIPTION.rst'
----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-5m3jj7uu/pushwoosh
It looks like some kind of path related issue. I'm not sure that pushwoosh.py is in the correct location. But if I move it to pushwoosh/pushwoosh.py, and add a pushwoosh/__init__.py fileI then need to import it as follows:
from pushwoosh.pushwoosh import Pushwoosh
This is obviously not ideal. From the documentation I can't see where I've gone wrong. What directory layout should I be using?
EDIT: I have now resolved the issue with DESCRIPTION.rst, but unless I move the pushwoosh.py file to a pushwoosh folder and add an __init__.py file, installing the library doesn't actually install pushwoosh.py so it doesn't work. How can I amend it so I can import it like this?
from pushwoosh import Pushwoosh

Figured it out in the end. It works if you put the file inside the module_name folder as __init__.py.

You could've just put this into your __init__py file.
from pushwoosh import Pushwoosh
This lets you make the import like this without packing everything into the init.py file itself.
from pushwoosh import Pushwoosh
for a nice explanation check out this post http://mikegrouchy.com/blog/2012/05/be-pythonic-__init__py.html

Unable to import git in python

I am facing these issues. Can you help me with the same ?
Why am I seeing this error ? Do I have to add anything in the requirements.txt file ?
>>> import git
Traceback (most recent call last):
File "<pyshell#7>", line 1, in <module>
import git
File "git\__init__.py", line 29, in <module>
_init_externals()
File "git\__init__.py", line 23, in _init_externals
raise ImportError("'gitdb' could not be found in your PYTHONPATH")
ImportError: 'gitdb' could not be found in your PYTHONPATH
>>> from git import Repo
Traceback (most recent call last):
File "<pyshell#8>", line 1, in <module>
from git import Repo
File "git\__init__.py", line 29, in <module>
_init_externals()
File "git\__init__.py", line 23, in _init_externals
raise ImportError("'gitdb' could not be found in your PYTHONPATH")
ImportError: 'gitdb' could not be found in your PYTHONPATH

I already had gitdb and smmap installed so I had to reinstall them.
You can reinstall them by running the following command in your terminal:
pip3 install --upgrade --force-reinstall gitdb; pip3 install --upgrade --force-reinstall smmap

I also got the message ImportError: 'gitdb' could not be found in your PYTHONPATH (when trying to use GitPython).BUT I had gitdb already installed!
Thanks to this hint I figured out that gitdb silently failed because it was missing smmap.
So I installed this and it worked.

You need to install gitdb package.
$ sudo easy_install gitdb

I had the same problem. However, gitdb and smmap were already installed by pip. As I used brew to install python and its dependencies on my mac, when I checked brew doctor command, it said that my /usr/local/sbin directory is not in my PATH. So I added it to my PATH (though it didn't have anything to do with the python) and everything worked out eventually.

MS Windows Versions of this problem can occur because of the order of Python versions in your system PATH, as it did for me. I did not realize that when I installed another program, it installed a newer version of Python for its own usage, and it appended my system PATH with the address to the newer version. I noticed it when I looked at the PATH variable and found two versions of Python being called. Windows uses the first it finds, and if the first doesn't match what your program expects, it gets confused and can't find the right path to the module. This is what I did to resolve it:
To check: an easy way to test if this is your problem is to see if the paths separated by semicolons are in the right order. That can be seen in the System Variables of Windows or by printing your PATH variable in your CMD shell like in this example:
C:> path
PATH=C:\Program Files (x86)\Python37-32\Scripts;C:\Program Files (x86)\Python37-32;C:\Program Files\Python38\Scripts;C:\WINDOWS
Temporary solution:
To see if it is going to fix your computer, change it in your CMD window. Your variable change will be discarded when the window is closed. One way to do this test is to copy the paths, move the Python references to the order they are needed, and write it back:
C:> set path = C:\WINDOWS;C:\Program Files (x86)\Python37-32;C:\Program Files\Python38\Scripts;C:\Program Files (x86)\Python37-32\Scripts\
Then run the Python program to see if this was your problem. Note that this is only an example; do not copy & paste it. Your path is customized for the programs on your computer.
Permanent solution: If the above test resolves your problem, you must change your System Variables to make the change permanent. For me that usually requires a reboot afterwards in order to make the variables appear in all new windows.