BUG: When using a Class for grouping commands `--self` shows as a flag

[chey]

Example code (example.py):

import fire

class Foo:
 def bar(self):
 return 'bar'

 def do_stuff(self, arg1):
 return 'stuff'

if __name__ == '__main__':
 fire.Fire(Foo)

Run:

python3 example.py -- --completion

Completion Output (take note of --self in output):

# bash completion support for example.py
# DO NOT EDIT.
# This script is autogenerated by fire/completion.py.

_complete-examplepy()
{
 local cur prev opts lastcommand
 COMPREPLY=()
 prev="${COMP_WORDS[COMP_CWORD-1]}"
 cur="${COMP_WORDS[COMP_CWORD]}"
 lastcommand=$(get_lastcommand)

 opts=""
 GLOBAL_OPTIONS=""


 case "${lastcommand}" in

 bar)

 if is_prev_global; then
 opts="${GLOBAL_OPTIONS}"
 else
 opts="--self ${GLOBAL_OPTIONS}"
 fi
 opts=$(filter_options $opts)
 ;;

 do-stuff)

 if is_prev_global; then
 opts="${GLOBAL_OPTIONS}"
 else
 opts="--arg1 --self ${GLOBAL_OPTIONS}"
 fi
 opts=$(filter_options $opts)
 ;;

 example.py)

 opts="bar do-stuff ${GLOBAL_OPTIONS}"
 opts=$(filter_options $opts)
 ;;
 esac

 COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
 return 0
}

get_lastcommand()
{
 local lastcommand i

 lastcommand=
 for ((i=0; i < ${#COMP_WORDS[@]}; ++i)); do
 if [[ ${COMP_WORDS[i]} != -* ]] && [[ -n ${COMP_WORDS[i]} ]] && [[
 ${COMP_WORDS[i]} != $cur ]]; then
 lastcommand=${COMP_WORDS[i]}
 fi
 done

 echo $lastcommand
}

filter_options()
{
 local opts
 opts=""
 for opt in "$@"
 do
 if ! option_already_entered $opt; then
 opts="$opts $opt"
 fi
 done

 echo $opts
}

option_already_entered()
{
 local opt
 for opt in ${COMP_WORDS[@]:0:COMP_CWORD}
 do
 if [ $1 == $opt ]; then
 return 0
 fi
 done
 return 1
}

is_prev_global()
{
 local opt
 for opt in $GLOBAL_OPTIONS
 do
 if [ $opt == $prev ]; then
 return 0
 fi
 done
 return 1
}

complete -F _complete-examplepy example.py