我需要制作一个驱动DYMO LabelManager PnP标签打印设备的程序。 DYMO为此提供了一个SDK，但在经过一番绝望的尝试之后，我会说SDK没用。然后我发现了一个程序，这正是我所需要的，由一个名叫S.Bronner的人写的。但问题是他的程序是在UNIX中用于Python的，我需要它在带有python的Windows中工作。所以我问，是否有人可以检查这些代码并将其转换为在Windows中为我工作？我的Python技能不足以实现这一目标。这是应该转换的代码：
#!/usr/bin/env python
DEV_CLASS = 3
DEV_VENDOR = 0x0922
DEV_PRODUCT = 0x1001
DEV_NODE = None
DEV_NAME = 'Dymo LabelManager PnP'
FONT_FILENAME = '/usr/share/fonts/truetype/ttf-bitstream-vera/Vera.ttf'
FONT_SIZERATIO = 7./8
import Image
import ImageDraw
import ImageFont
import array
import fcntl
import os
import re
import struct
import subprocess
import sys
import termios
import textwrap
class DymoLabeler:
"""
Create and work with a Dymo LabelManager PnP object.
This class contains both mid-level and high-level functions. In general,
the high-level functions should be used. However, special purpose usage
may require the mid-level functions. That is why they are provided.
However, they should be well understood before use. Look at the
high-level functions for help. Each function is marked in its docstring
with 'HLF' or 'MLF' in parentheses.
"""
def __init__(self, dev):
"""Initialize the LabelManager object. (HLF)"""
self.maxBytesPerLine = 8 # 64 pixels on a 12mm-tape
self.ESC = 0x1b
self.SYN = 0x16
self.cmd = []
self.rsp = False
self.bpl = None
self.dtb = 0
if not os.access(dev, os.R_OK | os.W_OK): return False
self.dev = open(dev, 'r+')
def sendCommand(self):
"""Send the already built command to the LabelManager. (MLF)"""
if len(self.cmd) == 0: return
cmdBin = array.array('B', self.cmd)
cmdBin.tofile(self.dev)
self.cmd = []
if not self.rsp: return
self.rsp = False
rspBin = self.dev.read(8)
rsp = array.array('B', rspBin).tolist()
return rsp
def resetCommand(self):
"""Remove a partially built command. (MLF)"""
self.cmd = []
self.rsp = False
def buildCommand(self, cmd):
"""Add the next instruction to the command. (MLF)"""
self.cmd += cmd
def statusRequest(self):
"""Set instruction to get the device's status. (MLF)"""
cmd = [self.ESC, ord('A')]
self.buildCommand(cmd)
self.rsp = True
def dotTab(self, value):
"""Set the bias text height, in bytes. (MLF)"""
if value < 0 or value > self.maxBytesPerLine: raise ValueError
cmd = [self.ESC, ord('B'), value]
self.buildCommand(cmd)
self.dtb = value
self.bpl = None
def tapeColor(self, value):
"""Set the tape color. (MLF)"""
if value < 0: raise ValueError
cmd = [self.ESC, ord('C'), value]
self.buildCommand(cmd)
def bytesPerLine(self, value):
"""Set the number of bytes sent in the following lines. (MLF)"""
if value < 0 or value + self.dtb > self.maxBytesPerLine: raise ValueError
if value == self.bpl: return
cmd = [self.ESC, ord('D'), value]
self.buildCommand(cmd)
self.bpl = value
def cut(self):
"""Set instruction to trigger cutting of the tape. (MLF)"""
cmd = [self.ESC, ord('E')]
self.buildCommand(cmd)
def line(self, value):
"""Set next printed line. (MLF)"""
self.bytesPerLine(len(value))
cmd = [self.SYN] + value
self.buildCommand(cmd)
def chainMark(self):
"""Set Chain Mark. (MLF)"""
self.dotTab(0)
self.bytesPerLine(self.maxBytesPerLine)
self.line([0x99] * self.maxBytesPerLine)
def skipLines(self, value):
"""Set number of lines of white to print. (MLF)"""
if value <= 0: raise ValueError
self.bytesPerLine(0)
cmd = [self.SYN] * value
self.buildCommand(cmd)
def initLabel(self):
"""Set the label initialization sequence. (MLF)"""
cmd = [0x00] * 8
self.buildCommand(cmd)
def getStatus(self):
"""Ask for and return the device's status. (HLF)"""
self.statusRequest()
rsp = self.sendCommand()
print rsp
def printLabel(self, lines, dotTab):
"""Print the label described by lines. (HLF)"""
self.initLabel
self.tapeColor(0)
self.dotTab(dotTab)
for line in lines:
self.line(line)
self.skipLines(56) # advance printed matter past cutter
self.skipLines(56) # add symmetric margin
self.statusRequest()
rsp = self.sendCommand()
print rsp
def die(message=None):
if message: print >> sys.stderr, message
sys.exit(1)
def pprint(par, fd=sys.stdout):
rows, columns = struct.unpack('HH', fcntl.ioctl(sys.stderr, termios.TIOCGWINSZ, struct.pack('HH', 0, 0)))
print >> fd, textwrap.fill(par, columns)
def getDeviceFile(classID, vendorID, productID):
# find file containing the device's major and minor numbers
searchdir = '/sys/bus/hid/devices'
pattern = '^%04d:%04X:%04X.[0-9A-F]{4}$' % (classID, vendorID, productID)
deviceCandidates = os.listdir(searchdir)
foundpath = None
for devname in deviceCandidates:
if re.match(pattern, devname):
foundpath = os.path.join(searchdir, devname)
break
if not foundpath: return
searchdir = os.path.join(foundpath, 'hidraw')
devname = os.listdir(searchdir)[0]
foundpath = os.path.join(searchdir, devname)
filepath = os.path.join(foundpath, 'dev')
# get the major and minor numbers
f = open(filepath, 'r')
devnums = [int(n) for n in f.readline().strip().split(':')]
f.close()
devnum = os.makedev(devnums[0], devnums[1])
# check if a symlink with the major and minor numbers is available
filepath = '/dev/char/%d:%d' % (devnums[0], devnums[1])
if os.path.exists(filepath):
return os.path.realpath(filepath)
# check if the relevant sysfs path component matches a file name in
# /dev, that has the proper major and minor numbers
filepath = os.path.join('/dev', devname)
if os.stat(filepath).st_rdev == devnum:
return filepath
# search for a device file with the proper major and minor numbers
for dirpath, dirnames, filenames in os.walk('/dev'):
for filename in filenames:
filepath = os.path.join(dirpath, filename)
if os.stat(filepath).st_rdev == devnum:
return filepath
def access_error(dev):
pprint('You do not have sufficient access to the device file %s:' % dev, sys.stderr)
subprocess.call(['ls', '-l', dev], stdout=sys.stderr)
print >> sys.stderr
pprint('You probably want to add a rule in /etc/udev/rules.d along the following lines:', sys.stderr)
print >> sys.stderr, ' SUBSYSTEM=="hidraw", \\'
print >> sys.stderr, ' ACTION=="add", \\'
print >> sys.stderr, ' DEVPATH=="/devices/pci[0-9]*/usb[0-9]*/0003:0922:1001.*/hidraw/hidraw0", \\'
print >> sys.stderr, ' GROUP="plugdev"'
print >> sys.stderr
pprint('Following that, turn off your device and back on again to activate the new permissions.', sys.stderr)
# get device file name
if not DEV_NODE:
dev = getDeviceFile(DEV_CLASS, DEV_VENDOR, DEV_PRODUCT)
else:
dev = DEV_NODE
if not dev: die("The device '%s' could not be found on this system." % DEV_NAME)
# create dymo labeler object
lm = DymoLabeler(dev)
if not lm: die(access_error(dev))
# check for any text specified on the command line
labeltext = [arg.decode(sys.stdin.encoding) for arg in sys.argv[1:]]
if len(labeltext) == 0: die("No label text was specified.")
# create an empty label image
labelheight = lm.maxBytesPerLine * 8
lineheight = float(labelheight) / len(labeltext)
fontsize = int(round(lineheight * FONT_SIZERATIO))
font = ImageFont.truetype(FONT_FILENAME, fontsize)
labelwidth = max(font.getsize(line)[0] for line in labeltext)
labelbitmap = Image.new('1', (labelwidth, labelheight))
# write the text into the empty image
labeldraw = ImageDraw.Draw(labelbitmap)
for i, line in enumerate(labeltext):
lineposition = int(round(i * lineheight))
labeldraw.text((0, lineposition), line, font=font, fill=255)
del labeldraw
# convert the image to the proper matrix for the dymo labeler object
labelrotated = labelbitmap.transpose(Image.ROTATE_270)
labelstream = labelrotated.tostring()
labelstreamrowlength = labelheight/8 + (1 if labelheight%8 != 0 else 0)
if len(labelstream)/labelstreamrowlength != labelwidth: die('An internal problem was encountered while processing the label bitmap!')
labelrows = [labelstream[i:i+labelstreamrowlength] for i in range(0, len(labelstream), labelstreamrowlength)]
labelmatrix = [array.array('B', labelrow).tolist() for labelrow in labelrows]
# optimize the matrix for the dymo label printer
dottab = 0
while max(line[0] for line in labelmatrix) == 0:
labelmatrix = [line[1:] for line in labelmatrix]
dottab += 1
for line in labelmatrix:
while len(line) > 0 and line[-1] == 0:
del line[-1]
# print the label
lm.printLabel(labelmatrix, dottab)
答案 0 :(得分：2)
FONT_FILENAME = '/usr/share/fonts/truetype/ttf-bitstream-vera/Vera.ttf'
// should be changed to path to the font on your system
无法正常工作。
searchdir = '/sys/bus/hid/devices'
// take a look at "pywinusb" library (?)
也不起作用，你必须以不同的方式获取设备。不确定从哪里来。同样的问题是
filepath = '/dev/char/%d:%d' % (devnums[0], devnums[1])
这在Windows中无法访问，您必须以不同的方式进行操作。
此外，其他一切看起来与操作系统无关。如果您在修复前3个问题后遇到任何错误，请将其编辑到您的问题中。