From 07d8e073ae1e64f4885eb41abc430438fa006dbe Mon Sep 17 00:00:00 2001 From: Patrick Kanzler Date: Fri, 27 Nov 2015 21:20:12 +0100 Subject: [PATCH] REFACTOR style and PEP8, fixes #66 --- escpos/__init__.py | 2 +- escpos/constants.py | 150 +++++++++++++++++++++---------------------- escpos/escpos.py | 88 +++++++++++-------------- escpos/exceptions.py | 5 +- escpos/printer.py | 35 +++------- 5 files changed, 128 insertions(+), 152 deletions(-) diff --git a/escpos/__init__.py b/escpos/__init__.py index 22a5af6..0459ce8 100644 --- a/escpos/__init__.py +++ b/escpos/__init__.py @@ -1 +1 @@ -__all__ = ["constants","escpos","exceptions","printer"] +__all__ = ["constants", "escpos", "exceptions", "printer"] diff --git a/escpos/constants.py b/escpos/constants.py index 7511365..0123839 100644 --- a/escpos/constants.py +++ b/escpos/constants.py @@ -1,86 +1,86 @@ """ ESC/POS Commands (Constants) """ # Feed control sequences -CTL_LF = '\x0a' # Print and line feed -CTL_FF = '\x0c' # Form feed -CTL_CR = '\x0d' # Carriage return -CTL_HT = '\x09' # Horizontal tab -CTL_SET_HT = '\x1b\x44' # Set horizontal tab positions -CTL_VT = '\x1b\x64\x04' # Vertical tab +CTL_LF = '\x0a' # Print and line feed +CTL_FF = '\x0c' # Form feed +CTL_CR = '\x0d' # Carriage return +CTL_HT = '\x09' # Horizontal tab +CTL_SET_HT = '\x1b\x44' # Set horizontal tab positions +CTL_VT = '\x1b\x64\x04' # Vertical tab # Printer hardware -HW_INIT = '\x1b\x40' # Clear data in buffer and reset modes -HW_SELECT = '\x1b\x3d\x01' # Printer select -HW_RESET = '\x1b\x3f\x0a\x00' # Reset printer hardware +HW_INIT = '\x1b\x40' # Clear data in buffer and reset modes +HW_SELECT = '\x1b\x3d\x01' # Printer select +HW_RESET = '\x1b\x3f\x0a\x00' # Reset printer hardware # Cash Drawer -CD_KICK_2 = '\x1b\x70\x00' # Sends a pulse to pin 2 [] -CD_KICK_5 = '\x1b\x70\x01' # Sends a pulse to pin 5 [] +CD_KICK_2 = '\x1b\x70\x00' # Sends a pulse to pin 2 [] +CD_KICK_5 = '\x1b\x70\x01' # Sends a pulse to pin 5 [] # Paper -PAPER_FULL_CUT = '\x1d\x56\x00' # Full cut paper -PAPER_PART_CUT = '\x1d\x56\x01' # Partial cut paper +PAPER_FULL_CUT = '\x1d\x56\x00' # Full cut paper +PAPER_PART_CUT = '\x1d\x56\x01' # Partial cut paper # Text format -TXT_NORMAL = '\x1b\x21\x00' # Normal text -TXT_2HEIGHT = '\x1b\x21\x10' # Double height text -TXT_2WIDTH = '\x1b\x21\x20' # Double width text -TXT_4SQUARE = '\x1b\x21\x30' # Quad area text -TXT_UNDERL_OFF = '\x1b\x2d\x00' # Underline font OFF -TXT_UNDERL_ON = '\x1b\x2d\x01' # Underline font 1-dot ON -TXT_UNDERL2_ON = '\x1b\x2d\x02' # Underline font 2-dot ON -TXT_BOLD_OFF = '\x1b\x45\x00' # Bold font OFF -TXT_BOLD_ON = '\x1b\x45\x01' # Bold font ON -TXT_FONT_A = '\x1b\x4d\x00' # Font type A -TXT_FONT_B = '\x1b\x4d\x01' # Font type B -TXT_ALIGN_LT = '\x1b\x61\x00' # Left justification -TXT_ALIGN_CT = '\x1b\x61\x01' # Centering -TXT_ALIGN_RT = '\x1b\x61\x02' # Right justification +TXT_NORMAL = '\x1b\x21\x00' # Normal text +TXT_2HEIGHT = '\x1b\x21\x10' # Double height text +TXT_2WIDTH = '\x1b\x21\x20' # Double width text +TXT_4SQUARE = '\x1b\x21\x30' # Quad area text +TXT_UNDERL_OFF = '\x1b\x2d\x00' # Underline font OFF +TXT_UNDERL_ON = '\x1b\x2d\x01' # Underline font 1-dot ON +TXT_UNDERL2_ON = '\x1b\x2d\x02' # Underline font 2-dot ON +TXT_BOLD_OFF = '\x1b\x45\x00' # Bold font OFF +TXT_BOLD_ON = '\x1b\x45\x01' # Bold font ON +TXT_FONT_A = '\x1b\x4d\x00' # Font type A +TXT_FONT_B = '\x1b\x4d\x01' # Font type B +TXT_ALIGN_LT = '\x1b\x61\x00' # Left justification +TXT_ALIGN_CT = '\x1b\x61\x01' # Centering +TXT_ALIGN_RT = '\x1b\x61\x02' # Right justification # Char code table -CHARCODE_PC437 = '\x1b\x74\x00' # USA: Standard Europe -CHARCODE_JIS = '\x1b\x74\x01' # Japanese Katakana -CHARCODE_PC850 = '\x1b\x74\x02' # Multilingual -CHARCODE_PC860 = '\x1b\x74\x03' # Portuguese -CHARCODE_PC863 = '\x1b\x74\x04' # Canadian-French -CHARCODE_PC865 = '\x1b\x74\x05' # Nordic -CHARCODE_WEU = '\x1b\x74\x06' # Simplified Kanji, Hirakana -CHARCODE_GREEK = '\x1b\x74\x07' # Simplified Kanji -CHARCODE_HEBREW = '\x1b\x74\x08' # Simplified Kanji -CHARCODE_PC1252 = '\x1b\x74\x11' # Western European Windows Code Set -CHARCODE_PC866 = '\x1b\x74\x12' # Cirillic #2 -CHARCODE_PC852 = '\x1b\x74\x13' # Latin 2 -CHARCODE_PC858 = '\x1b\x74\x14' # Euro -CHARCODE_THAI42 = '\x1b\x74\x15' # Thai character code 42 -CHARCODE_THAI11 = '\x1b\x74\x16' # Thai character code 11 -CHARCODE_THAI13 = '\x1b\x74\x17' # Thai character code 13 -CHARCODE_THAI14 = '\x1b\x74\x18' # Thai character code 14 -CHARCODE_THAI16 = '\x1b\x74\x19' # Thai character code 16 -CHARCODE_THAI17 = '\x1b\x74\x1a' # Thai character code 17 -CHARCODE_THAI18 = '\x1b\x74\x1b' # Thai character code 18 +CHARCODE_PC437 = '\x1b\x74\x00' # USA: Standard Europe +CHARCODE_JIS = '\x1b\x74\x01' # Japanese Katakana +CHARCODE_PC850 = '\x1b\x74\x02' # Multilingual +CHARCODE_PC860 = '\x1b\x74\x03' # Portuguese +CHARCODE_PC863 = '\x1b\x74\x04' # Canadian-French +CHARCODE_PC865 = '\x1b\x74\x05' # Nordic +CHARCODE_WEU = '\x1b\x74\x06' # Simplified Kanji, Hirakana +CHARCODE_GREEK = '\x1b\x74\x07' # Simplified Kanji +CHARCODE_HEBREW = '\x1b\x74\x08' # Simplified Kanji +CHARCODE_PC1252 = '\x1b\x74\x11' # Western European Windows Code Set +CHARCODE_PC866 = '\x1b\x74\x12' # Cirillic #2 +CHARCODE_PC852 = '\x1b\x74\x13' # Latin 2 +CHARCODE_PC858 = '\x1b\x74\x14' # Euro +CHARCODE_THAI42 = '\x1b\x74\x15' # Thai character code 42 +CHARCODE_THAI11 = '\x1b\x74\x16' # Thai character code 11 +CHARCODE_THAI13 = '\x1b\x74\x17' # Thai character code 13 +CHARCODE_THAI14 = '\x1b\x74\x18' # Thai character code 14 +CHARCODE_THAI16 = '\x1b\x74\x19' # Thai character code 16 +CHARCODE_THAI17 = '\x1b\x74\x1a' # Thai character code 17 +CHARCODE_THAI18 = '\x1b\x74\x1b' # Thai character code 18 # Barcode format -BARCODE_TXT_OFF = '\x1d\x48\x00' # HRI barcode chars OFF -BARCODE_TXT_ABV = '\x1d\x48\x01' # HRI barcode chars above -BARCODE_TXT_BLW = '\x1d\x48\x02' # HRI barcode chars below -BARCODE_TXT_BTH = '\x1d\x48\x03' # HRI barcode chars both above and below -BARCODE_FONT_A = '\x1d\x66\x00' # Font type A for HRI barcode chars -BARCODE_FONT_B = '\x1d\x66\x01' # Font type B for HRI barcode chars -BARCODE_HEIGHT = '\x1d\x68\x64' # Barcode Height [1-255] -BARCODE_WIDTH = '\x1d\x77\x03' # Barcode Width [2-6] -BARCODE_UPC_A = '\x1d\x6b\x00' # Barcode type UPC-A -BARCODE_UPC_E = '\x1d\x6b\x01' # Barcode type UPC-E -BARCODE_EAN13 = '\x1d\x6b\x02' # Barcode type EAN13 -BARCODE_EAN8 = '\x1d\x6b\x03' # Barcode type EAN8 -BARCODE_CODE39 = '\x1d\x6b\x04' # Barcode type CODE39 -BARCODE_ITF = '\x1d\x6b\x05' # Barcode type ITF -BARCODE_NW7 = '\x1d\x6b\x06' # Barcode type NW7 +BARCODE_TXT_OFF = '\x1d\x48\x00' # HRI barcode chars OFF +BARCODE_TXT_ABV = '\x1d\x48\x01' # HRI barcode chars above +BARCODE_TXT_BLW = '\x1d\x48\x02' # HRI barcode chars below +BARCODE_TXT_BTH = '\x1d\x48\x03' # HRI barcode chars both above and below +BARCODE_FONT_A = '\x1d\x66\x00' # Font type A for HRI barcode chars +BARCODE_FONT_B = '\x1d\x66\x01' # Font type B for HRI barcode chars +BARCODE_HEIGHT = '\x1d\x68\x64' # Barcode Height [1-255] +BARCODE_WIDTH = '\x1d\x77\x03' # Barcode Width [2-6] +BARCODE_UPC_A = '\x1d\x6b\x00' # Barcode type UPC-A +BARCODE_UPC_E = '\x1d\x6b\x01' # Barcode type UPC-E +BARCODE_EAN13 = '\x1d\x6b\x02' # Barcode type EAN13 +BARCODE_EAN8 = '\x1d\x6b\x03' # Barcode type EAN8 +BARCODE_CODE39 = '\x1d\x6b\x04' # Barcode type CODE39 +BARCODE_ITF = '\x1d\x6b\x05' # Barcode type ITF +BARCODE_NW7 = '\x1d\x6b\x06' # Barcode type NW7 # Image format -S_RASTER_N = '\x1d\x76\x30\x00' # Set raster image normal size -S_RASTER_2W = '\x1d\x76\x30\x01' # Set raster image double width -S_RASTER_2H = '\x1d\x76\x30\x02' # Set raster image double height -S_RASTER_Q = '\x1d\x76\x30\x03' # Set raster image quadruple +S_RASTER_N = '\x1d\x76\x30\x00' # Set raster image normal size +S_RASTER_2W = '\x1d\x76\x30\x01' # Set raster image double width +S_RASTER_2H = '\x1d\x76\x30\x02' # Set raster image double height +S_RASTER_Q = '\x1d\x76\x30\x03' # Set raster image quadruple # Printing Density -PD_N50 = '\x1d\x7c\x00' # Printing Density -50% -PD_N37 = '\x1d\x7c\x01' # Printing Density -37.5% -PD_N25 = '\x1d\x7c\x02' # Printing Density -25% -PD_N12 = '\x1d\x7c\x03' # Printing Density -12.5% -PD_0 = '\x1d\x7c\x04' # Printing Density 0% -PD_P50 = '\x1d\x7c\x08' # Printing Density +50% -PD_P37 = '\x1d\x7c\x07' # Printing Density +37.5% -PD_P25 = '\x1d\x7c\x06' # Printing Density +25% -PD_P12 = '\x1d\x7c\x05' # Printing Density +12.5% +PD_N50 = '\x1d\x7c\x00' # Printing Density -50% +PD_N37 = '\x1d\x7c\x01' # Printing Density -37.5% +PD_N25 = '\x1d\x7c\x02' # Printing Density -25% +PD_N12 = '\x1d\x7c\x03' # Printing Density -12.5% +PD_0 = '\x1d\x7c\x04' # Printing Density 0% +PD_P50 = '\x1d\x7c\x08' # Printing Density +50% +PD_P37 = '\x1d\x7c\x07' # Printing Density +37.5% +PD_P25 = '\x1d\x7c\x06' # Printing Density +25% +PD_P12 = '\x1d\x7c\x05' # Printing Density +12.5% diff --git a/escpos/escpos.py b/escpos/escpos.py index 7a76b98..4bec5f2 100644 --- a/escpos/escpos.py +++ b/escpos/escpos.py @@ -12,41 +12,40 @@ except ImportError: from PIL import Image import qrcode -import time from constants import * from exceptions import * + class Escpos(object): """ ESC/POS Printer object """ - device = None + device = None - - def _check_image_size(self, size): + @staticmethod + def _check_image_size(size): """ Check and fix the size of the image to 32 bits """ if size % 32 == 0: - return (0, 0) + return 0, 0 else: image_border = 32 - (size % 32) if (image_border % 2) == 0: - return (image_border / 2, image_border / 2) + return image_border / 2, image_border / 2 else: - return (image_border / 2, (image_border / 2) + 1) - + return image_border / 2, (image_border / 2) + 1 def _print_image(self, line, size): """ Print formatted image """ i = 0 cont = 0 buffer = "" - + self._raw(S_RASTER_N) - buffer = "%02X%02X%02X%02X" % (((size[0]/size[1])/8), 0, size[1]&0xff, size[1]>>8) + buffer = "%02X%02X%02X%02X" % (((size[0]/size[1])/8), 0, size[1] & 0xff, size[1] >> 8) self._raw(buffer.decode('hex')) buffer = "" while i < len(line): - hex_string = int(line[i:i+8],2) + hex_string = int(line[i:i+8], 2) buffer += "%02X" % hex_string i += 8 cont += 1 @@ -55,19 +54,17 @@ class Escpos(object): buffer = "" cont = 0 - def _convert_image(self, im): """ Parse image and prepare it to a printable format """ - pixels = [] + pixels = [] pix_line = "" - im_left = "" + im_left = "" im_right = "" - switch = 0 - img_size = [ 0, 0 ] - + switch = 0 + img_size = [0, 0] if im.size[0] > 512: - print ("WARNING: Image is wider than 512 and could be truncated at print time ") + print ("WARNING: Image is wider than 512 and could be truncated at print time ") if im.size[1] > 0xffff: raise ImageSizeError() @@ -87,7 +84,7 @@ class Escpos(object): im_color = (RGB[0] + RGB[1] + RGB[2]) im_pattern = "1X0" pattern_len = len(im_pattern) - switch = (switch - 1 ) * (-1) + switch = (switch - 1) * (-1) for x in range(pattern_len): if im_color <= (255 * 3 / pattern_len * (x+1)): if im_pattern[x] == "X": @@ -97,30 +94,28 @@ class Escpos(object): break elif (255 * 3 / pattern_len * pattern_len) < im_color <= (255 * 3): pix_line += im_pattern[-1] - break + break pix_line += im_right img_size[0] += im_border[1] self._print_image(pix_line, img_size) - - def image(self,path_img): + def image(self, path_img): """ Open image file """ im_open = Image.open(path_img) - # Remove the alpha channel on transparent images - if im_open.mode == 'RGBA': - im_open.load() - im = Image.new("RGB", im_open.size, (255, 255, 255)) - im.paste(im_open, mask=im_open.split()[3]) - else: - im = im_open.convert("RGB") + # Remove the alpha channel on transparent images + if im_open.mode == 'RGBA': + im_open.load() + im = Image.new("RGB", im_open.size, (255, 255, 255)) + im.paste(im_open, mask=im_open.split()[3]) + else: + im = im_open.convert("RGB") # Convert the RGB image in printable image self._convert_image(im) - - def qr(self,text): + def qr(self, text): """ Print QR Code for the provided string """ qr_code = qrcode.QRCode(version=4, box_size=4, border=1) qr_code.add_data(text) @@ -131,8 +126,7 @@ class Escpos(object): # Convert the RGB image in printable image self._convert_image(im) - - def charcode(self,code): + def charcode(self, code): """ Set Character Code Table """ if code.upper() == "USA": self._raw(CHARCODE_PC437) @@ -184,19 +178,19 @@ class Escpos(object): # Align Bar Code() self._raw(TXT_ALIGN_CT) # Height - if height >=2 or height <=6: + if height >= 2 or height <= 6: self._raw(BARCODE_HEIGHT) else: raise BarcodeSizeError() # Width - if width >= 1 or width <=255: + if width >= 1 or width <= 255: self._raw(BARCODE_WIDTH) else: raise BarcodeSizeError() # Font if font.upper() == "B": self._raw(BARCODE_FONT_B) - else: # DEFAULT FONT: A + else: # DEFAULT FONT: A self._raw(BARCODE_FONT_A) # Position if pos.upper() == "OFF": @@ -205,9 +199,9 @@ class Escpos(object): self._raw(BARCODE_TXT_BTH) elif pos.upper() == "ABOVE": self._raw(BARCODE_TXT_ABV) - else: # DEFAULT POSITION: BELOW + else: # DEFAULT POSITION: BELOW self._raw(BARCODE_TXT_BLW) - # Type + # Type if bc.upper() == "UPC-A": self._raw(BARCODE_UPC_A) elif bc.upper() == "UPC-E": @@ -228,9 +222,8 @@ class Escpos(object): if code: self._raw(code) else: - raise exception.BarcodeCodeError() + raise BarcodeCodeError() - def text(self, txt): """ Print alpha-numeric text """ if txt: @@ -238,7 +231,6 @@ class Escpos(object): else: raise TextError() - def set(self, align='left', font='a', type='normal', width=1, height=1, density=9): """ Set text properties """ # Width @@ -251,7 +243,7 @@ class Escpos(object): elif width == 2 and height != 2: self._raw(TXT_NORMAL) self._raw(TXT_2WIDTH) - else: # DEFAULT SIZE: NORMAL + else: # DEFAULT SIZE: NORMAL self._raw(TXT_NORMAL) # Type if type.upper() == "B": @@ -303,10 +295,9 @@ class Escpos(object): self._raw(PD_P37) elif density == 8: self._raw(PD_P50) - else:# DEFAULT: DOES NOTHING + else: # DEFAULT: DOES NOTHING pass - def cut(self, mode=''): """ Cut paper """ # Fix the size between last line and cut @@ -314,10 +305,9 @@ class Escpos(object): self._raw("\n\n\n\n\n\n") if mode.upper() == "PART": self._raw(PAPER_PART_CUT) - else: # DEFAULT MODE: FULL CUT + else: # DEFAULT MODE: FULL CUT self._raw(PAPER_FULL_CUT) - def cashdraw(self, pin): """ Send pulse to kick the cash drawer """ if pin == 2: @@ -327,7 +317,6 @@ class Escpos(object): else: raise CashDrawerError() - def hw(self, hw): """ Hardware operations """ if hw.upper() == "INIT": @@ -336,17 +325,16 @@ class Escpos(object): self._raw(HW_SELECT) elif hw.upper() == "RESET": self._raw(HW_RESET) - else: # DEFAULT: DOES NOTHING + else: # DEFAULT: DOES NOTHING pass - def control(self, ctl, pos=4): """ Feed control sequences """ # Set tab positions if pos < 1 or pos > 16: raise TabError() else: - self._raw("".join([CTL_SET_HT,hex(pos)])) + self._raw("".join([CTL_SET_HT, hex(pos)])) # Set position if ctl.upper() == "LF": self._raw(CTL_LF) diff --git a/escpos/exceptions.py b/escpos/exceptions.py index 0d482aa..e1700e3 100644 --- a/escpos/exceptions.py +++ b/escpos/exceptions.py @@ -1,6 +1,5 @@ """ ESC/POS Exceptions classes """ -import os class Error(Exception): """ Base class for ESC/POS errors """ @@ -35,6 +34,7 @@ class BarcodeTypeError(Error): def __str__(self): return "No Barcode type is defined" + class BarcodeSizeError(Error): def __init__(self, msg=""): Error.__init__(self, msg) @@ -44,6 +44,7 @@ class BarcodeSizeError(Error): def __str__(self): return "Barcode size is out of range" + class BarcodeCodeError(Error): def __init__(self, msg=""): Error.__init__(self, msg) @@ -53,6 +54,7 @@ class BarcodeCodeError(Error): def __str__(self): return "Code was not supplied" + class ImageSizeError(Error): def __init__(self, msg=""): Error.__init__(self, msg) @@ -62,6 +64,7 @@ class ImageSizeError(Error): def __str__(self): return "Image height is longer than 255px and can't be printed" + class TextError(Error): def __init__(self, msg=""): Error.__init__(self, msg) diff --git a/escpos/printer.py b/escpos/printer.py index 3a3bc84..b6d9ca2 100644 --- a/escpos/printer.py +++ b/escpos/printer.py @@ -12,9 +12,9 @@ import serial import socket from escpos import * -from constants import * from exceptions import * + class Usb(Escpos): """ Define USB printer """ @@ -26,14 +26,13 @@ class Usb(Escpos): @param in_ep : Input end point @param out_ep : Output end point """ - self.idVendor = idVendor + self.idVendor = idVendor self.idProduct = idProduct self.interface = interface - self.in_ep = in_ep - self.out_ep = out_ep + self.in_ep = in_ep + self.out_ep = out_ep self.open() - def open(self): """ Search device on USB tree and set is as escpos device """ self.device = usb.core.find(idVendor=self.idVendor, idProduct=self.idProduct) @@ -52,7 +51,7 @@ class Usb(Escpos): self.device.detach_kernel_driver(0) except usb.core.USBError as e: if check_driver is not None: - print "Could not detatch kernel driver: %s" % str(e) + print "Could not detach kernel driver: %s" % str(e) try: self.device.set_configuration() @@ -60,12 +59,10 @@ class Usb(Escpos): except usb.core.USBError as e: print "Could not set configuration: %s" % str(e) - def _raw(self, msg): """ Print any command sent in raw format """ self.device.write(self.out_ep, msg, self.interface) - def __del__(self): """ Release USB interface """ if self.device: @@ -73,13 +70,12 @@ class Usb(Escpos): self.device = None - class Serial(Escpos): """ Define Serial printer """ def __init__(self, devfile="/dev/ttyS0", baudrate=9600, bytesize=8, timeout=1, parity=serial.PARITY_NONE, stopbits=serial.STOPBITS_ONE, - xonxoff=False , dsrdtr=True): + xonxoff=False, dsrdtr=True): """ @param devfile : Device file under dev filesystem @param baudrate : Baud rate for serial transmission @@ -91,10 +87,10 @@ class Serial(Escpos): @param xonxoff : Software flow control @param dsrdtr : Hardware flow control (False to enable RTS/CTS) """ - self.devfile = devfile + self.devfile = devfile self.baudrate = baudrate self.bytesize = bytesize - self.timeout = timeout + self.timeout = timeout self.parity = parity self.stopbits = stopbits @@ -103,7 +99,6 @@ class Serial(Escpos): self.open() - def open(self): """ Setup serial port and set is as escpos device """ self.device = serial.Serial(port=self.devfile, baudrate=self.baudrate, @@ -116,23 +111,20 @@ class Serial(Escpos): else: print "Unable to open serial printer on: %s" % self.devfile - def _raw(self, msg): """ Print any command sent in raw format """ self.device.write(msg) - def __del__(self): """ Close Serial interface """ if self.device is not None: self.device.close() - class Network(Escpos): """ Define Network printer """ - def __init__(self,host,port=9100): + def __init__(self, host, port=9100): """ @param host : Printer's hostname or IP address @param port : Port to write to @@ -141,7 +133,6 @@ class Network(Escpos): self.port = port self.open() - def open(self): """ Open TCP socket and set it as escpos device """ self.device = socket.socket(socket.AF_INET, socket.SOCK_STREAM) @@ -150,18 +141,15 @@ class Network(Escpos): if self.device is None: print "Could not open socket for %s" % self.host - def _raw(self, msg): """ Print any command sent in raw format """ self.device.send(msg) - def __del__(self): """ Close TCP connection """ self.device.close() - class File(Escpos): """ Define Generic file printer """ @@ -172,7 +160,6 @@ class File(Escpos): self.devfile = devfile self.open() - def open(self): """ Open system file """ self.device = open(self.devfile, "wb") @@ -180,11 +167,9 @@ class File(Escpos): if self.device is None: print "Could not open the specified file %s" % self.devfile - def _raw(self, msg): """ Print any command sent in raw format """ - self.device.write(msg); - + self.device.write(msg) def __del__(self): """ Close system file """