PIL:ValueError:未知的重采样过滤器，如何调整Flask上载的图像的大小? [英] PIL: ValueError: unknown resampling filter, How to resize images uploaded on Flask?

问题描述

我正在使用Flask制作网络应用，并且我想调整上传图像的大小.我正在使用PIL来执行此操作，但是会引发错误.

I'm making a web app using Flask, and I want to resize the images that are uploaded. I'm using PIL to do this, but an error is thrown.

执行此操作的过程是这样的，但效率似乎很低:

The process to do it is like this, but it seems inefficient:

filename = secure_filename(form.image.data.filename)
form.image.data.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))
img = Image.open(os.path.join(app.config['UPLOAD_FOLDER'],filename), 'r')
img = img.resize(300, 300)
img.save(filename, quality=100, optimize=True)

我要做的是在用户上传图片后保存图片，打开新文件，调整其大小，然后再次保存.

What I'm trying to do is save the image after the user uploaded it, open the new file, resize it, and save it again.

如何解决我的错误?

还有使用Python库更有效地执行此操作(不保存未调整大小的文件)的方法吗?

Also is there a way to do this more efficiently (without saving the un-resized file), using a Python library?

推荐答案

img = img.resize(300，300)

img = img.resize(300, 300)

=> img = img.resize((300,300))

=> img = img.resize((300,300))

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