| Argument | Description | Type | 
| symbols | The security trading symbol(s) you wish to query | String, or List | 
| name | The name of the dataset (required) | String | 
| as _of | The date in time that you wish the data to be. as_of defaults to now. This value can be any past date so that you can see the data as it was known on the “as of” date. | String Format YYYY-MM-DD HH:MM:SS (HH:MM:SS is optional) | 
| back_to | The date where the return dataset should begin. This is reading all the data “back to” the specified date. | String Format YYYY-MM-DD HH:MM:SS (HH:MM:SS is optional) | 
| url | Optional. The url of the liberator server that you are querying. This defaults to 'https://api.cloudquant.ai'. You can also set it to an IP Address. E.g. 'http://127.0.0.1: 47753' | String | 
| system | The name of the authorized system that you are querying from. The security mechanism in liberator authorized users for individual systems. | String This is almost always “API” | 
| fields | Optional : Filter down the column names to just those required. You cannot remove mandatory fields | String, or List | 
| crux_key | if querying for a Crux data set | String (your Crux Key) | 
| compress | The data compression method on the wire. CloudQuant uses compression. | String. Always compressed_transfer | 
| json_xfer | Json transfer. This is usually False | Boolean. Always False | 
| user | The user identifier (as assigned by CloudQuant) | String | 
| token | The user’s assigned token | String | 
