Hello,
Actually i'm working in a project ( i want to update a customer instead of creating it ) 
i did this code but it doesn't work any idea !! 

if record.email:

  contact = env['res.partner'].search([['email', '=', record.email]])

  if contact:

    for c in contact:

      if c.id != record.id :

        records.update({

          'mobile': record.mobile,

          'phone' : '22'

        })