title: Print report with python odoo
body: <p>How to print the list of customer.payment records, which state are in open using wizard. Here is my module. I am using Odoo 9.</p>
  
  <pre><code>class CustomerPayment(models.Model):
      _name = 'customer.payment'
      _rec_name = 'name'
  
  
      name = fields.Char(default="New")
      invoice_number = fields.Many2one('account.invoice')
      customer = fields.Many2one('res.partner')
      application_id = fields.Many2one('admission.form')
      date = fields.Date()
      reference = fields.Char()
      cashier = fields.Many2one('res.users')
      journal_item = fields.Many2one('journal.item')
      payment_account = fields.Many2one('erp.account', default=default_payment_account)
      payment_line = fields.One2many('payment.line','payment_id')
      description = fields.Text()
      state = fields.Selection([('open','Open'), ('payed','Payed'),('refund','Refund')], default="open")
      total = fields.Float(compute="get_total")
      due_amount = fields.Float(compute="get_payable")
      payed = fields.Float()
      course_id = fields.Many2one('student.course')
      payable = fields.Float()
      discount = fields.Float(compute="get_discount")
      journal = fields.Many2one('erp.journal', default=get_default_journal)
      type = fields.Selection([('sale','Sale'),('purchase','Purchase')])
  
  class report_wizard(models.TransientModel):
      _name = 'report.wizard'
  </code></pre>
  
  <p>Here is function sample, hope you get what I am trying to do. 
  <code>Account_report</code> is module name and <code>payment_report</code> is a report which print only one record using print button. </p>
  
  <pre><code>@api.multi
  def print_report(self)
     data = self.env['customer.payment'].search([('state','=','open')])
     return self.env['report'].render('account_report.payment_report', data)
  </code></pre>