即6位数字代码date：日期，格式YYYY-MM-DDvol：手数，默认为400手，
In Python, the built-in datetime module makes it easy to get the current date and time, format it, or even do time math. In this Byte, we'll focus on how to get today's date and format it in the YYYY-MM-DD format. Dates and Times in Python Python provides the datetime module ...