Выдаёт ошибку object of type set not JSON serializable
import json
# Make it work for Python 2+3 and with Unicode
import io
try:
to_unicode = unicode
except NameError:
to_unicode = str
# Define data
data = {'users':{'user','user2'}}
# Write JSON file
with io.open('data.json', 'w', encoding='utf8') as outfile:
str_ = json.dumps(data,
indent=4, sort_keys=True,
separators=(',', ': '), ensure_ascii=False)
outfile.write(to_unicode(str_))
# Read JSON file
with open('data.json') as data_file:
data_loaded = json.load(data_file)
print(data_loaded)