def parse_json(json_input):
"""
:param string:
:return:
"""
# load const tree
const_tree = ConstTree.from_string(json_input['const_tree'])
# load grammar
grammar_list = [Grammar.from_string(i) for i in json_input['grammar']]
# load lexicon list
for i in json_input['lexicon']:
Lexicon.from_string(i)
word_set = Lexicon.lexicon_dict
root = generate_f_strcuture(const_tree, grammar_list, word_set)
output_string = f_structure_to_xml(json_input['const_tree'], root)
return output_string
