def _get_space_character_free_column_resolvers(self):
from pandas.core.computation.common import _remove_spaces_column_name<EOL>return {_remove_spaces_column_name(k): v for k, v<EOL>in self.iteritems()}<EOL>
Return the space character free column resolvers of a dataframe.

        Column names with spaces are 'cleaned up' so that they can be referred
        to by backtick quoting.
        Used in :meth:`DataFrame.eval`.