setop/python-escpos
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Please mypy type checking

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This commit is contained in:
belono 2023-09-06 23:10:20 +02:00
parent e8814e4acb
commit a825f8f06d
1 changed files with 8 additions and 4 deletions
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12
src/escpos/escpos.py
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@ -14,7 +14,7 @@ This module contains the abstract base class :py:class:`Escpos`.
import textwrap import textwrap
from abc import ABCMeta, abstractmethod # abstract base class support from abc import ABCMeta, abstractmethod # abstract base class support
from re import match as re_match from re import match as re_match
from typing import List, Optional, Union from typing import List, Optional, Union, Literal
import barcode import barcode
import qrcode import qrcode
@ -114,7 +114,11 @@ class Escpos(object):
class. class.
""" """
_device = False # False -> Uninitialized # device status:
# False -> Not initialized
# None -> Initialized but not connected
# object -> The connection object (Usb(), Serial(), Network(), etc.)
_device: Union[Literal[False], Literal[None], object] = False
def __init__(self, profile=None, magic_encode_args=None, **kwargs) -> None: def __init__(self, profile=None, magic_encode_args=None, **kwargs) -> None:
"""Initialize ESCPOS Printer. """Initialize ESCPOS Printer.
@ -129,7 +133,7 @@ class Escpos(object):
self.close() self.close()
@property @property
def device(self) -> object: def device(self) -> Union[Literal[False], Literal[None], object]:
"""Implements a self-open mechanism. """Implements a self-open mechanism.
An attempt to get the property before open the connection An attempt to get the property before open the connection
@ -142,7 +146,7 @@ class Escpos(object):
return self._device return self._device
@device.setter @device.setter
def device(self, new_device: object): def device(self, new_device: Union[Literal[False], Literal[None], object]):
self._device = new_device self._device = new_device
def open(self): def open(self):