title: YouCompleteMe unavailable: unable to load Python
body: <p>I use Linux CentOS-7-x86_64 and am trying to install YouCompleteMe with vundle.  I get the error:</p>
  
  <pre><code>YouCompleteMe unavailable: unable to load Python.
  </code></pre>
  
  <p>however, when I type <code>vim --version</code> I get:</p>
  
  <pre><code>VIM - Vi IMproved 8.2 (2019 Dec 12, compiled Apr 13 2020 22:48:56)
  Included patches: 1-577
  Compiled by louqinjian@localhost.localdomain
  Huge version without GUI.  Features included (+) or not (-):
  +acl               -farsi             +mouse_sgr         +tag_binary
  +arabic            +file_in_path      -mouse_sysmouse    -tag_old_static
  +autocmd           +find_in_path      +mouse_urxvt       -tag_any_white
  +autochdir         +float             +mouse_xterm       -tcl
  -autoservername    +folding           +multi_byte        +termguicolors
  -balloon_eval      -footer            +multi_lang        +terminal
  +balloon_eval_term +fork()            -mzscheme          +terminfo
  -browse            +gettext           +netbeans_intg     +termresponse
  ++builtin_terms    -hangul_input      +num64             +textobjects
  +byte_offset       +iconv             +packages          +textprop
  +channel           +insert_expand     +path_extra        +timers
  +cindent           +ipv6              +perl              +title
  -clientserver      +job               +persistent_undo   -toolbar
  -clipboard         +jumplist          +popupwin          +user_commands
  +cmdline_compl     +keymap            +postscript        +vartabs
  +cmdline_hist      +lambda            +printer           +vertsplit
  +cmdline_info      +langmap           +profile           +virtualedit
  +comments          +libcall           +python/dyn        +visual
  +conceal           +linebreak         +python3/dyn       +visualextra
  +cryptv            +lispindent        +quickfix          +viminfo
  +cscope            +listcmds          +reltime           +vreplace
  +cursorbind        +localmap          +rightleft         +wildignore
  +cursorshape       +lua               +ruby              +wildmenu
  +dialog_con        +menu              +scrollbind        +windows
  +diff              +mksession         +signs             +writebackup
  +digraphs          +modify_fname      +smartindent       -X11
  -dnd               +mouse             -sound             -xfontset
  -ebcdic            -mouseshape        +spell             -xim
  +emacs_tags        +mouse_dec         +startuptime       -xpm
  +eval              -mouse_gpm         +statusline        -xsmp
  +ex_extra          -mouse_jsbterm     -sun_workshop      -xterm_clipboard
  +extra_search      +mouse_netterm     +syntax            -xterm_save
     system vimrc file: "$VIM/vimrc"
       user vimrc file: "$HOME/.vimrc"
   2nd user vimrc file: "~/.vim/vimrc"
        user exrc file: "$HOME/.exrc"
         defaults file: "$VIMRUNTIME/defaults.vim"
    fall-back for $VIM: "/usr/local/share/vim"
  Compilation: gcc -std=gnu99 -c -I. -Iproto -DHAVE_CONFIG_H     -g -O2 -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=1       
  Linking: gcc -std=gnu99   -L. -Wl,-z,relro -fstack-protector -rdynamic -Wl,-export-dynamic -Wl,--enable-new-dtags -Wl,-rpath,/usr/lib64/perl5/CORE   -L/usr/local/lib -Wl,--as-needed -o vim        -lm -ltinfo  -lselinux   -ldl  -L/usr/lib -llua -Wl,--enable-new-dtags -Wl,-rpath,/usr/lib64/perl5/CORE  -fstack-protector  -L/usr/lib64/perl5/CORE -lperl -lresolv -lnsl -ldl -lm -lcrypt -lutil -lpthread -lc    -lruby -lpthread -lrt -ldl -lcrypt -lm  
  </code></pre>
  
  <p>And, when I install vim with <code>.configure</code>, I include</p>
  
  <pre><code>--with-features=huge --enable-python3interp --enable-pythoninterp
  </code></pre>
  
  <p>What can I do to solve this?</p>