Python reportlab 用画布保存到指定位置 [英] Python reportlab save with canvas to specified location

问题描述

我想知道如何将我的脚本保存到桌面.这是我的代码:

I am wondering how I can make my script save to the Desktop. Here's my code:

from reportlab.pdfgen import canvas
from reportlab.lib.pagesizes import letter
from reportlab.platypus import Image

import csv
import os

data_file = "hata.csv"


def import_data(data_file):
    inv_data = csv.reader(open(data_file, "r"))
    for row in inv_data:
        var1 = row[0]
        # do more stuff

        pdf_file = os.path.abspath("~/Desktop/%s.pdf" % var1)
        generate_pdf(variable, pdf_file)


def generate_pdf(variable, file_name):

    c = canvas.Canvas(file_name, pagesize=letter)

    # do some stuff with my variables
    c.setFont("Helvetica", 40, leading=None)
    c.drawString(150, 2300, var1)

    c.showPage()
    c.save()

import_data(data_file)

所以这很完美，它保存/创建了我想要的 PDF - 但在脚本的目录中.相反，我想将其保存到桌面.

So this works perfectly, and it saves/creates the PDF I want -- but in the directory of the script. I would instead like to save it to, say, the Desktop.

当我研究发现os.path.abspath时，我以为我解决了；但我收到以下错误

When I researched and found os.path.abspath, I thought I solved it; but I receive the following error

File "/usr/local/lib/python3.4/site-packages/reportlab/pdfbase/pdfdoc.py", line 218, in SaveToFile
    f = open(filename, "wb")
FileNotFoundError: [Errno 2] No such file or directory: '/Users/TARDIS/Desktop/tests/~/Desktop/00001.pdf'

它告诉我它正在尝试从我脚本的主文件夹开始保存.我如何让它看到外面的东西?

which tells me that it's trying to save starting from my script's home folder. How do I get it to see outside of that?

推荐答案

在使用不同方法进行多次尝试和错误后，所有方法都有缺点，我想出了一个解决方案，并想把它张贴在这里以供后人使用.我对编程很陌生，所以如果这对更有经验的人来说很明显，我深表歉意.

After much trial and error using different methods that all had drawbacks, I came up with a solution and figured I'd post it here for posterity. I'm rather new to programming so apologies if this is obvious to the more experienced.

首先，我为我的 pdf 文件命名:

First, I give my pdf file a name:

pdf_name = number + ".pdf"

然后，我找到当前用户的桌面路径(假设我不知道用户名是什么，这是问题的原始根源)并创建一个路径，以便pdf可以将被保存在那里.

Then, I find the path to the Desktop for current user (given that I don't know what the user name will be, which was the original root of the problem) and create a path to it so that the pdf can be to be saved there.

save_name = os.path.join(os.path.expanduser("~"), "Desktop/", pdf_name)

最后，它传递给了我的 pdf 生成函数:

Finally, that's passed in to my pdf generation function:

...
    save_name = ....
    generate_pdf(variable, save_name)

def generate_pdf(variable, save_name):

    c = canvas.Canvas(save_name, pagesize=letter)
....

就是这样.

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