Describe the environment_path option properly

README.rst

@@ -208,6 +208,11 @@ get more information. If you set them to ``""``, they are not assigned.
     let g:jedi#completions_command = "<C-Space>"
     let g:jedi#rename_command = "<leader>r"
 
+A few examples of setting up your project:
+
+.. code-block:: vim
+
+    let g:jedi#environment_path = "<leader>d"
 
 Finally, if you don't want completion, but all the other features, use:
 

doc/jedi-vim.txt

@@ -44,6 +44,7 @@ Contents                                *jedi-vim-contents*
     6.12. force_py_version              |g:jedi#force_py_version|
     6.13. smart_auto_mappings           |g:jedi#smart_auto_mappings|
     6.14. use_tag_stack                 |g:jedi#use_tag_stack|
+    6.15. environment_path              |g:jedi#environment_path|
 7. Testing                              |jedi-vim-testing|
 8. Contributing                         |jedi-vim-contributing|
 9. License                              |jedi-vim-license|
@@ -506,6 +507,17 @@ definition with arbitrary changes to the |jumplist|.
 Options: 0 or 1
 Default: 1 (enabled by default)
 
+------------------------------------------------------------------------------
+6.15. `g:jedi#environment_path`                *g:jedi#environment_path*
+
+To use a specific virtualenv or a specific Python version it is possible to
+set an interpreter.
+
+Both setting the directory and setting a project is working.
+
+Examples: "/usr/bin/python3.9", "venv", "../venv", "../venv/bin/python"
+Default: "auto"
+
 ==============================================================================
 7. Testing                              *jedi-vim-testing*
 

pythonx/jedi_vim.py

@@ -211,19 +211,16 @@ def _check_jedi_availability(show_error=False):
     return func_receiver
 
 
+# Tuple of cache key / project
 _current_project_cache = None, None
 
 
-def _create_project_cache_key(project_path, environment_path):
-    return dict(project_path=project_path, environment_path=environment_path)
-
-
 def get_project():
     global _current_project_cache
 
     vim_environment_path = vim_eval("g:jedi#environment_path")
     vim_project_path = vim_eval("g:jedi#project_path")
-    cache_key = _create_project_cache_key(vim_project_path, vim_environment_path)
+    cache_key = dict(project_path=vim_project_path, environment_path=vim_environment_path)
 
     if cache_key == _current_project_cache[0]:
         return _current_project_cache[1]