odoo-survey-addons/survey_partner_input/views/res_partner.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>

  <record id="res_partner_form" model="ir.ui.view">
    <field name="name">survey_partner_input res.partner form</field>
    <field name="model">res.partner</field>
    <field name="inherit_id" ref="base.view_partner_form"/>
    <field name="priority">24</field>
    <field name="arch" type="xml">
      <xpath expr="//div[@name='button_box']/button[1]" position="before">
        <button type="object" name="action_survey_user_input"
          context="{'link_only':1, 'search_default_by_state':1}"
          attrs="{'invisible':[('tot_sent_survey','=',0)]}" class="oe_stat_button">
          <field string="Completed" name="sent_comp_ratio" widget="percentpie"/>
        </button>
        <button type="object" name="action_survey_user_input" class="oe_stat_button" icon="fa-pencil-square-o"
          context="{'search_default_completed':1, 'search_default_group_by_survey':1}"
          attrs="{'invisible':[('tot_sent_survey','=',0),('tot_comp_survey','=',0)]}">
          <field string="Answers" name="tot_comp_survey" widget="statinfo"/>
        </button>
      </xpath>
      <xpath expr="//div[hasclass('oe_title')]" position="after">
        <field name="tot_sent_survey" invisible="1"/>
        <field name="tot_sent_comp_survey" invisible="1"/>
      </xpath>
    </field>
  </record>

</odoo>