code: def checkout(self, transparent=False, **kwargs):
          
          self.data['currency'] = self.config.CURRENCY
          self.build_checkout_params(**kwargs)
          if transparent:
              response = self.post(url=self.config.TRANSPARENT_CHECKOUT_URL)
          else:
              response = self.post(url=self.config.CHECKOUT_URL)
          return PagSeguroCheckoutResponse(response.content, config=self.config)
docs: create a pagseguro checkout