Installing coolprop on matlab

>> pyversion C:\matlab\Python\python.exe
>> pyversion

       version: '3.8'
    executable: 'C:\matlab\Python\python.exe'
       library: 'C:\matlab\Python\python38.dll'
          home: 'C:\matlab\Python'
      isloaded: 0

>> [v,e] = pyversion; system([e,  ' -m pip install --user -U CoolProp'])
WARNING: pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available. 
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/coolprop/ 
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/coolprop/ 
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/coolprop/ 
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/coolprop/ 
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/coolprop/ 
Could not fetch URL https://pypi.org/simple/coolprop/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org', port=443): Max retries exceeded with url: /simple/coolprop/ (Caused by SSLError("Can't connect to HTTPS URL because the SSL module is not available.")) - skipping 
ERROR: Could not find a version that satisfies the requirement CoolProp (from versions: none) 
ERROR: No matching distribution found for CoolProp 
WARNING: pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available. 
Could not fetch URL https://pypi.org/simple/pip/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org', port=443): Max retries exceeded with url: /simple/pip/ (Caused by SSLError("Can't connect to HTTPS URL because the SSL module is not available.")) - skipping 

ans =

     1

Hello,

While trying to have Coolprop library on my matlab, I am facing some errors, that I don't understand. Could you help me understanding this error and debugging it please?

[Anna Baker]

Hi! I was also having a similar issue trying to use CoolProp for a project. I noticed that the CoolProp website uses Python 3.6 for the version. I believe I had Python 3.8 as well and tried downloading Python 3.6 and changed the version used in MATLAB to 3.6. After doing this I was able to successfully run the command to have CoolProp loaded into MATLAB. I am now having an issue calling values, but CoolProp is loaded in.

Try downloading Python 3.6 and changing your version in MATLAB to 3.6 using the commands on the CoolProp website. Maybe that will resolve the errors.

[Sarah Mignon]

[v,e] = pyversion; system([e,  ' -m pip install --user -U CoolProp'])
C:\matlab\Python\python.exe: No module named pip 

ans =

     1    

Thank you Anna for your help, it helped me not having this error anymore but now I have this... Seems like Coolprop is really hard to install on matlab.

Do you have by any chance an idea of what is happening here?

[Walter Roberson]

@Sarah Mignon

On MacOS I had to install pip first, as the python version is 2.7 which did not yet have pip installed (pip was automatically installed as of 2.7.9)

What I did on MacOS was to open Terminal (command line) and use

cd /tmp
curl https://bootstrap.pypa.io/pip/2.7/get-pip.py -o get-pip.py
python get-pip.py

After that I was able to go into MATLAB and execute

[v,e] = pyversion; system([e,' -m pip install --user -U CoolProp'])

As you appear to be using MS Windows, you might need to install curl first; see https://www.addictivetips.com/windows-tips/use-curl-on-windows-10/ . Instead of cd /tmp you can cd to any convenient directory that you have write access to, such as your downloads directory.