使用 win32api 打印内存对象

Question

尝试打印使用reportlab生成的PDF，但ShellExecute()抛出异常TypeError: Objects of type 'bytes' can not be converted to Unicode.

我已经尝试过了pdf.decode('utf-8')，但我得到了UnicodeDecodeError: 'utf-8' codec can't decode byte 0x93 in position 10: invalid start byte

from io import BytesIO
import win32api
from reportlab.pdfgen import canvas
from reportlab.lib.pagesizes import letter


x = 100
y = 100
buffer = BytesIO()
p = canvas.Canvas(buffer, pagesize=letter)
p.drawString(x, y, "Hello World")
p.showPage()
p.save()
pdf = buffer.getvalue()
buffer.close()

win32api.ShellExecute(0, "print", pdf, None, ".", 0)

Answer 1

你正在尝试的事情根本不可能。您不能将字节数组作为参数传递给printshell 动词。您需要将字节数组保存到临时文件，然后将该临时文件名作为参数传递给print.