Load only default/forced py_version, changed names and variable type

1. Changed pycmd: renamed to py_version, changed type, resulting in
...#force_py_version = <int> (2 or 3)
2. Changed structure of initialization, changes broke functionality
(<sfile> behaviour changes inside a function)
3. Cleaned up.

autoload/jedi.vim

@@ -193,20 +193,23 @@ function! jedi#complete_opened()
 endfunction
 
 
-function! jedi#force_pycmd(pycmd)
-    let g:jedi#force_pycmd = a:pycmd
-    exec("command! -nargs=1 Python ".a:pycmd." <args>")
+function! jedi#force_py_version(py_version)
+    let g:jedi#force_py_version = a:py_version
+    if g:jedi#force_py_version == 2
+        command! -nargs=1 Python python <args>
+        execute 'pyfile '.s:script_path.'/initialize.py'
+    elseif g:jedi#force_py_version == 3
+        command! -nargs=1 Python python3 <args>
+        execute 'py3file '.s:script_path.'/initialize.py'
+    endif
 endfunction
 
 
-function! jedi#force_pycmd_switch()
-    if g:jedi#force_pycmd == 'python'
-      call jedi#force_pycmd('python3')
-    elseif g:jedi#force_pycmd == 'python3'
-      call jedi#force_pycmd('python')
-    else
-      " to be able switch from custom pycmd's
-      call jedi#force_pycmd('python')
+function! jedi#force_py_version_switch()
+    if g:jedi#force_py_version == 2
+        call jedi#force_py_version(3)
+    elseif g:jedi#force_py_version == 3
+        call jedi#force_py_version(2)
     endif
 endfunction
 
@@ -246,7 +249,7 @@ let s:settings = {
     \ 'popup_select_first': 1,
     \ 'quickfix_window_height': 10,
     \ 'completions_enabled': 1,
-    \ 'force_pycmd': "'python'"
+    \ 'force_py_version': 2
 \ }
 
 
@@ -273,10 +276,16 @@ call s:init()
 " Python initialization
 " ------------------------------------------------------------------------
 
-if has('python')
+let s:script_path = fnameescape(expand('<sfile>:p:h:h'))
+
+if has('python') && has('python3')
+    call jedi#force_py_version(g:jedi#force_py_version)
+elseif has('python')
     command! -nargs=1 Python python <args>
+    execute 'pyfile '.s:script_path.'/initialize.py'
 elseif has('python3')
     command! -nargs=1 Python python3 <args>
+    execute 'py3file '.s:script_path.'/initialize.py'
 else
     if !exists("g:jedi#squelch_py_warning")
         echomsg "Error: jedi-vim requires vim compiled with +python"
@@ -284,18 +293,6 @@ else
     finish
 end
 
-if has('python') && has('python3')
-    call jedi#force_pycmd(g:jedi#force_pycmd)
-endif
-
-" jedi_vim.py has to be imported for 'python' and 'python3' each
-if has('python')
-    execute 'pyfile '.fnameescape(expand('<sfile>:p:h:h')).'/initialize.py'
-endif
-
-if has('python3')
-    execute 'py3file '.fnameescape(expand('<sfile>:p:h:h')).'/initialize.py'
-endif
 
 "Python jedi_vim.jedi.set_debug_function(jedi_vim.print_to_stdout, speed=True, warnings=False, notices=False)
 "Python jedi_vim.jedi.set_debug_function(jedi_vim.print_to_stdout)

doc/jedi-vim.txt

@@ -38,7 +38,7 @@ Contents				*jedi-vim-contents*
     6.8. squelch_py_warning		|g:jedi#squelch_py_warning|
     6.9. completions_enable		|g:jedi#completions_enable|
     6.10. use_splits_not_buffers	|g:jedi#use_splits_not_buffers|
-    6.11. force_pycmd                   |g:jedi#force_pycmd|
+    6.11. force_py_version              |g:jedi#force_py_version|
 7. Testing				|jedi-vim-testing|
 8. Contributing				|jedi-vim-contributing|
 9. License				|jedi-vim-license|
@@ -405,23 +405,23 @@ Options: top, left, right or bottom
 Default: "" (not enabled by default)
 
 ------------------------------------------------------------------------------
-6.11. `g:jedi#force_pycmd`                *g:jedi#force_pycmd*
+6.11. `g:jedi#force_py_version`                *g:jedi#force_py_version*
 
 If you have installed both python 2 and python 3, you can force which one jedi
 should use by setting this variable. It forces the internal Vim command, which
 will be used for every jedi call to the respective python interpreter.
-The variable can be set in the .vimrc like this:
+The variable can be set in the .vimrc like this to force python 3:
 
-let g:jedi#force_pycmd = 'python3'
+let g:jedi#force_py_version = 3
 
 This variable can be switched during runtime using the following function:
-Function: `jedi#force_pycmd_switch()`
+Function: `jedi#force_py_version_switch()`
 
 or set directly using this function, which has the same name as the variable:
-Function: `jedi#force_pycmd(pycmd)`
+Function: `jedi#force_py_version(py_version)`
 
-Options: 'python' or 'python3'
-Default: 'python'
+Options: 2 or 3
+Default: 2
 
 ==============================================================================
 7. Testing				*jedi-vim-testing*

initialize.py

@@ -9,14 +9,15 @@ import vim
 import sys
 import os
 
-# vim.command('echom expand("<sfile>:p:h:h")')
-sys.path.insert(0, os.path.join(vim.eval('expand("<sfile>:p:h:h")'), 'jedi'))
+# vim.command('echom expand("<sfile>:p:h:h")') # broken, <sfile> inside function
+# sys.path.insert(0, os.path.join(vim.eval('expand("<sfile>:p:h:h")'), 'jedi'))
+sys.path.insert(0, os.path.join(vim.eval('s:script_path'), 'jedi'))
 
 # to display errors correctly
 import traceback
 
 # update the sys path to include the jedi_vim script
-sys.path.insert(1, vim.eval('expand("<sfile>:p:h:h")'))
+sys.path.insert(0, vim.eval('s:script_path'))
 try:
     import jedi_vim
 except ImportError: