class purchase_report(report_sxw.rml_parse):
    def __init__(self, cr, uid, name, context):
        super(purchase_report, self).__init__(cr, uid, name, context=context)
        self.localcontext.update({
            'time': time,
            # 'get_purchase': self.get_purchase,
            'get_filtered_purchase':self.get_filtered_purchase,
            })

def get_filtered_purchase(self):
    uid = self.uid
    ids = self.ids
    filter_rec = self.pool.get('filter_wizard').browse(self.cr,uid,ids)
    cu_id = filter_rec.customer.id
    self.cr.excecute("SELECT partner_id FROM purchase_order WHERE partner_id = %s " %(cu_id))
    return  self.cr.fetchall()

class report_purchaseorder_qweb(osv.AbstractModel):
    _name = 'report.ship.report_wizard'
    _inherit = 'report.abstract_report'
    _template = 'ship.report_wizard'
    _wrapped_report_class = purchase_report

<template id="report_wizard">
    <t t-call="report.html_container">
        <t t-foreach="docs" t-as="doc">
        <t t-call="report.external_layout">
        <div class="page">
            <div class="oe_structure" />
                  <td>
                         <strong>
                          <t t-set="records" t-value="get_filtered_purchase()"/>
                           <tr t-foreach="records" t-as="rec">
                              <td><span t-esc="rec.name"/> </td>
                              <td><span t-esc="rec.date_order"/></td>
                          </tr>
                      </strong>
                      <!--<strong>Purchase Order:-->
                      <!--<t t-set="records" t-value="get_purchase()"/>-->
                      <!--<table>-->
                          <!--<thead>-->
                              <!--<th>Reference</th>-->
                              <!--<th>Order Date</th>-->
                          <!--</thead>-->
                          <!--<tbody>-->
                              <!--<tr t-foreach="records" t-as="record">-->
                              <!--<td><span t-esc="record.name"/> </td>-->
                              <!--<td><span t-esc="record.date_order"/></td>-->
                          <!--</tr>-->
                          <!--</tbody>-->
                      <!--</table>-->
                      <!--&lt;!&ndash;<span t-esc="name"/>&ndash;&gt;-->
                  <!--</strong>-->
                  </td>

                 <!--<div class="text-center"><h1><span t-esc="doc.customer"></span></h1></div>-->
                 <!--<div class="text-center"><h1><span t-esc="doc.selection_field"></span></h1></div>-->
                 <!--<div class="text-center"><h1><span t-esc="doc.date_from"></span></h1></div>-->
                 <!--<div class="text-center"><h1><span t-esc="doc.date_to"></span></h1></div>-->
                 <!--<div class="text-center"><h1><span t-esc="o.purchase_order"></span></h1></div>-->
            </div>
    </t>
    </t>
    </t>
</template>