如何使 cStringIO 对另一个需要真实本地文件的函数透明

发布于 2024-09-27 19:30:39 字数 606 浏览 5 评论 0原文

我遇到了以下问题：代码 A 现在可以工作。我在本地保存一个名为 Chart.png 的 png 文件，然后将其加载到专有函数中（我无权访问该函数）。

但是，在代码 B 中，我尝试使用 cStringIO.StringIO()，这样我就不必将文件“chart.png”写入磁盘。但我找不到将其传递给 pproprietaryfunction 的方法，因为它需要一个像“chart.png”这样的真实文件名（看起来它甚至使用 split 函数来识别扩展名）。

代码 A（正在运行的代码）：

file = "chart.png"
pylab.savefig(file, format='png')
 a = proprietaryfunction.add(file)

代码 B（我正在尝试执行的操作 - 但不起作用）：

file = cStringIO.StringIO()
pylab.savefig(file, format='png')
 a = proprietaryfunction.add(file)

如何使 cStringIO.StringIO() 的使用对专有函数透明？无论如何，我可以为此在内存中模拟虚拟文件系统吗？

原文

I came up with the following problem: CODE A works right now.. I am saving a png file called chart.png locally, and then I am loading it into the proprietary function (which I do not have access).

However, in CODE B, am trying to use cStringIO.StringIO() so that I do not have to write the file "chart.png" to the disk. But I cannot find a way to pass it to the pproprietaryfunction because it is expecting a real filename like "chart.png" (it looks like it even uses the split function to identify the extension).

CODE A (code running right now):

file = "chart.png"
pylab.savefig(file, format='png')
 a = proprietaryfunction.add(file)

CODE B (what I am trying to do - and does not work):

file = cStringIO.StringIO()
pylab.savefig(file, format='png')
 a = proprietaryfunction.add(file)

How can I make the use of cStringIO.StringIO() transparent to the proprietary function? Is there anyway that I can emulate a virtual file system in memory for this?

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