def invoice_begin(self, **kwargs):
defined_args = dict(invoice_type=('invoice', 'pharmacy'),
number=None,
nip=None,
description=('both', 'original'),
paymentname=None,
paymentdate=None,
recipient=None,
issuer=None,
copies=None,
margins=('yes', 'no'),
signarea=('yes', 'no'),
customernameoptions=('info', 'all', 'none'),
sellernameoptions=('info', 'all', 'none'),
paidlabel=None,
selldate=None,
buyerlabel=None,
additionalinfo=None)
cmd = E.invoice()
cmd.set('action', 'begin')
# Prepare options
options = set(kwargs.pop('options', []))
if options:
for op in options:
if op in range(1, 20):
op_tag = cmd.append(E.option('', id=str(op)))
# Prepare customer info
customer = kwargs.pop('customer', [])
for cust in customer:
cust_tag = cmd.append(E.customer(cust))
args = {}
for name, value in kwargs.items():
if name not in defined_args:
raise TypeError('Unknown argument: {}'.format(name))
allowed_values = defined_args.get(name)
if allowed_values is not None and value not in allowed_values:
raise TypeError(
'Argument {} has wrong value: {} (not in {})'.format(
name, value, allowed_values))
if value is not None:
cmd.set(name, str(value))
self.send_command(cmd, check_for_errors=True)
