In OpenERP first, create custom module and then create object in your own module and put your own module in your OpenERP server.

Follow these step given below

Step1- First create module like as a test and then create file like as a test.py file in test module and then create object and fields in test.py file and pass this file in __init__.py file.

Using this code given below

from openerp import api
from datetime import datetime
from openerp.tools.translate import _
class customer_visibles(osv.osv):    
    _name = "customer.visibles "
    
    _columns = {
                'customer': fields.many2one('res.partner', readonly=True, string="Customer Name", required=True),
                'transaction_type': fields.selection([('deposit', 'Deposit'),('withdraw', 'Withdrawal')], string="Transaction Type"),
                'deposit': fields.float("Amount"),

 }
customer_visibles()

Step2- Then, create another file like as a test.xml file in your existing module and pass this file __openerp__.py and ones this done, relate all fields in test.py file .

Using this code given below

<?xml version="1.0" encoding="UTF-8"?>
<openerp>
    <data>
  <record id="customer_transaction_view" model="ir.ui.view">
            <field name="name">customer_visibles</field>
            <field name="model">customer.visibles</field>
            <field name="arch" type="xml">
                <form string="Customer">
                <header>
                </header>
                  <sheet>
                  	<group>
                    <group>
                    	<field name="customer"/>
                        <field name="deposit" attrs="{'invisible': [('transaction_type','!=','deposit')]}" style="width:50%%"/>
                        <field name="withdraw" attrs="{'invisible': [('transaction_type','!=','withdraw')]}" style="width:50%%"/>
<!--           
                      </group>
              </sheet>
           </form>
         </field>
 </record>
</data>
</openerp>