正如在此答案中提到的，可能的解决方法是打开一个子进程以使用ghostscript：
canvas.postscript(file="tmp.ps", colormode='color')process = subprocess.Popen(["ps2pdf", "tmp.ps", "result.pdf"], shell=True)
另一个解决方案是使用ReportLab，但是由于它
addPostscriptCommand不是很可靠，我认为您必须使用Python
Imaging
Library将PS文件首先转换为图像，然后再将其添加到ReportLab
Canvas中。但是，我建议使用ghostscript方法。
这是我用来查看是否有效的基本概念证明：
"""Setup for Ghostscript 9.07:Download it from http://www.ghostscript.com/GPL_Ghostscript_9.07.htmland add `/path/to/gs9.07/bin/` and `/path/to/gs9.07/lib/` to your path."""import Tkinter as tkimport subprocessimport osclass App(tk.Tk): def __init__(self): tk.Tk.__init__(self) self.title("Canvas2PDF") self.line_start = None self.canvas = tk.Canvas(self, width=300, height=300, bg="white") self.canvas.bind("<Button-1>", lambda e: self.draw(e.x, e.y)) self.button = tk.Button(self, text="Generate PDF", command=self.generate_pdf) self.canvas.pack() self.button.pack(pady=10) def draw(self, x, y): if self.line_start: x_origin, y_origin = self.line_start self.canvas.create_line(x_origin, y_origin, x, y) self.line_start = None else: self.line_start = (x, y) def generate_pdf(self): self.canvas.postscript(file="tmp.ps", colormode='color') process = subprocess.Popen(["ps2pdf", "tmp.ps", "result.pdf"], shell=True) process.wait() os.remove("tmp.ps") self.destroy()app = App()app.mainloop()
