Vim: how to install the UltiSnips plugin?

Question

I tried installing the UltiSnips plugin, but when Vim is loaded it creates a torrent of errors:

Error detected while processing C:\Documents and Settings\username\vimfiles\bundle\UltiSnips-2.2\plugin\UltiSnips.vim:
line  226:
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ImportError: No module named os
line  229:
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "C:\Documents and Settings\username\vimfiles\bundle\UltiSnips-2.2\pl
ugin\UltiSnips\__init__.py", line 4, in <module>
    from functools import wraps
ImportError: No module named functools
line  230:
Traceback (most recent call last):
  File "<string>", line 1, in <module>
NameError: name 'UltiSnips_Manager' is not defined
line  231:
Traceback (most recent call last):
  File "<string>", line 1, in <module>
NameError: name 'UltiSnips_Manager' is not defined
line  232:
Traceback (most recent call last):
  File "<string>", line 1, in <module>
NameError: name 'UltiSnips_Manager' is not defined

What I did:

I installed the pathogen plugin, then extracted the contents of 'UltiSnips-2.2.tar.gz' to 'vimfiles/bundle/'

What I found for install instructions:

http://www.vim.org/scripts/script.php?script_id=2715

The instructions only refer to concept of 'installing' as indicating how to get the source code. There are no step by step instructions. After a cursory glance I am lead to believe that the contents of 'UltiSnips-2.2.tar.gz' (provided directly on that page) is identical to the contents of the git repository.

Edit with more information:

This is gvim on windows XP. :echo has("python") returns 1.

The relevant bits of :version regarding python is:

+python/dyn -python3
-DFEAT_PYTHON -DDYNAMIC_PYTHON -DDYNAMIC_PYTHON_DLL="python26.dll"

full contents of :version:

VIM - Vi IMproved 7.3 (2010 Aug 15, compiled Jan  4 2011 14:09:41)
MS-Windows 32-bit GUI version with OLE support
Included patches: 1-98
Compiled by [email protected]
Huge version with GUI.  Features included (+) or not (-):
+arabic +autocmd +balloon_eval +browse ++builtin_terms +byte_offset +cindent +clientserver +clipboard +cmdline_compl +cmdline_hist +cmdline_info 
+comments +conceal +cryptv +cscope +cursorbind +cursorshape +dialog_con_gui +diff +digraphs -dnd -ebcdic +emacs_tags +eval +ex_extra +extra_search 
+farsi +file_in_path +find_in_path +float +folding -footer +gettext/dyn -hangul_input +iconv/dyn +insert_expand +jumplist +keymap +langmap +libcall
 +linebreak +lispindent +listcmds +localmap +lua/dyn +menu +mksession +modify_fname +mouse +mouseshape +multi_byte_ime/dyn +multi_lang 
+mzscheme/dyn +netbeans_intg +ole -osfiletype +path_extra +perl/dyn +persistent_undo -postscript +printer +profile +python/dyn -python3 +quickfix 
+reltime +rightleft +ruby/dyn +scrollbind +signs +smartindent -sniff +startuptime +statusline -sun_workshop +syntax +tag_binary +tag_old_static 
-tag_any_white +tcl/dyn -tgetent -termresponse +textobjects +title +toolbar +user_commands +vertsplit +virtualedit +visual +visualextra +viminfo 
+vreplace +wildignore +wildmenu +windows +writebackup -xfontset -xim -xterm_save -xpm_w32 
   system vimrc file: "$VIM\vimrc"
     user vimrc file: "$HOME\_vimrc"
 2nd user vimrc file: "$VIM\_vimrc"
      user exrc file: "$HOME\_exrc"
  2nd user exrc file: "$VIM\_exrc"
  system gvimrc file: "$VIM\gvimrc"
    user gvimrc file: "$HOME\_gvimrc"
2nd user gvimrc file: "$VIM\_gvimrc"
    system menu file: "$VIMRUNTIME\menu.vim"
Compilation: gcc -O3 -fomit-frame-pointer -freg-struct-return -fno-strength-reduce -DWIN32 -DHAVE_PATHDEF -DFEAT_HUGE -DWINVER=0x0400 -D_WIN32_WINNT=0x0400 -DFEAT_PERL -DDYNAMIC_PERL -DDYNAMIC_PERL_DLL="perl58.dll" -DFEAT_PYTHON -DDYNAMIC_PYTHON -DDYNAMIC_PYTHON_DLL="python26.dll" -DFEAT_RUBY -DDYNAMIC_RUBY -DDYNAMIC_RUBY_DLL="msvcrt-ruby18.dll" -DDYNAMIC_RUBY_VER=18 -DFEAT_MZSCHEME -DDYNAMIC_MZSCHEME -DDYNAMIC_MZSCH_DLL="libmzsch42.dll" -DDYNAMIC_MZGC_DLL="libmzgc42.dll" -DINCLUDE_MZSCHEME_BASE -DFEAT_TCL -DDYNAMIC_TCL -DDYNAMIC_TCL_DLL="tcl85.dll" -DFEAT_LUA -DDYNAMIC_LUA -DDYNAMIC_LUA_DLL="lua51.dll" -DDYNAMIC_GETTEXT -DDYNAMIC_ICONV -DFEAT_MBYTE -DFEAT_MBYTE_IME -DDYNAMIC_IME -DFEAT_CSCOPE -DFEAT_NETBEANS_INTG -DFEAT_GUI_W32 -DFEAT_CLIPBOARD -DFEAT_OLE -march=i386 -Iproto -I/cygdrive/c/strawberry/perl/lib/CORE -I/cygdrive/c/RUBY/lib/ruby/1.8/i386-mswin32 -I/cygdrive/c/PROGRA~1/MzScheme/include -I/cygdrive/c/Tcl/include -I/cygdrive/c/PROGRA~1/Lua/5.1/include -s -mno-cygwin
Linking: gcc -s -o gvim.exe  -luuid -lole32 /cygdrive/c/Tcl/lib/tclstub85.lib -lwsock32 -mwindows -lcomctl32 -lversion -loleaut32 -lstdc++

Answer 1

Make sure vim has been compiled with python support. You can check this by running

vim --version | grep python

and looking for +python or run echo has('python') and see if it outputs 1.

If vim has been compiled with python support make sure that python (2) is in your PATH.