默认情况下 odoo工资条的计算只支持一下几种python变量：

# payslip: object containing the payslips
# employee: hr.employee object
# contract: hr.contract object
# rules: object containing the rules code (previously computed)
# categories: object containing the computed salary rule categories (sum of amount of all rules belonging to that category).
# worked_days: object containing the computed worked days.
# inputs: object containing the computed inputs.

# Note: returned value have to be set in the variable 'result'

实际使用过程种，我们可能想要用的到变量要远远多于这些个变量，比如，如果工资条上想要加入对销售订单的提成比例，那么这个公式按道理应该是可以写到工资计算规则里的

可是，我们应该如何获取销售单对象呢？（sale.order)

具体方法，请阅读以下文章：

http://www.cnblogs.com/post/readauth?url=/kfx2007/p/6060871.html

或者安装qunar_payroll这个模块。