The available columns for any given table are fetched from a system table called "sys_tablecolumns". A specific table name is provided in the WHERE criteria to restrict the table from which the column information is fetched:

import cdata.workday as mod
conn = mod.connect("ConnectionType=SOAP;User=myuser;Password=mypassword;Tenant=mycompany;BaseURL=https://wd3-impl-services1.workday.com")
cur = conn.cursor()
cmd = "SELECT * FROM sys_tablecolumns WHERE TableName = '[CData].[Human_Resources].Workers'"
cur.execute(cmd)
rs = cur.fetchall()
for row in rs:
	print(row)