def already_downloaded(film_description):
dbx = db.set_up_dropbox()
try:
film_base = jdb.read_from_db(dbx, db_filename)
if film_description in film_base['records']:
return True
else:
return False
except EnvironmentError:
print db_filename, 'doesn\'t exists!'
print "Unexpected error:", sys.exc_info()
jdb.new_empty_db(dbx, db_filename)
return False
def new_empty_db(dbx_obj, filename):
clear_data = {'total': 0, 'records': []}
clear_data = json.dumps(clear_data, indent=4)
db.upload_data(dbx_obj, clear_data, filename, overwrite=True)
def add_to_db(dbx_obj, additional_data, filename):
data = read_from_db(dbx_obj, filename)
data['records'].extend(additional_data)
data['total'] = len(data['records'])
data = json.dumps(data, indent=4)
db.upload_data(dbx_obj, data, filename, overwrite=True)
def read_from_db(dbx_obj, filename):
data = db.download(dbx_obj, filename)
return json.loads(data)
if __name__ == '__main__':
dbx = db.set_up_dropbox()
name = 'data.json'
new_empty_db(dbx, name)
print read_from_db(dbx, name)
add_to_db(dbx, {'name': name, 'test_data': 'not empty'}, name)
print read_from_db(dbx, name)
add_to_db(dbx, {'name': name + ', again', 'test_data': 'not empty, again'}, name)
print read_from_db(dbx, name)
add_to_db(dbx, {'name': name + ', again', 'test_data': ''}, name)
print read_from_db(dbx, name)