Check that nbconvert can be called

doc/source/conf.py

@@ -28,11 +28,11 @@ import teqp
 release = teqp.__version__
 
 # -- Exeucute all notebooks --------------------------------------------------
-
+subprocess.check_output(f'jupyter nbconvert --version', shell=True, cwd=path)
 for path, dirs, files in os.walk('.'):
     for file in files:
         if file.endswith('.ipynb'):
-            subprocess.check_output(f'jupyter nbconvert --ExecutePreprocessor.allow_errors=True --to notebook --output {file} --execute {file}', cwd=path)
+            subprocess.check_output(f'jupyter nbconvert --ExecutePreprocessor.allow_errors=True --to notebook --output {file} --execute {file}', shell=True, cwd=path)
 
 # -- General configuration ---------------------------------------------------