Python 如何使用PIL获取图像格式？
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How to get the format of image with PIL?
提问by NeoWang
After loading an image file with PIL.Image, how can I determine whether the image file is a PNG/JPG/BMP/GIF? I understand very little about these file formats, can PIL get the formatmetadata from the file header? Or does it need to 'analyze' the data within the file?
使用 PIL.Image 加载图像文件后，如何确定图像文件是否为 PNG/JPG/BMP/GIF？我对这些文件格式了解很少，PIL可以format从文件头中获取元数据吗？还是需要“分析”文件中的数据？
If PIL doesn't provide such an API, is there any python library that does?
如果 PIL 不提供这样的 API，是否有任何 python 库提供？
采纳答案by Mikko Ohtamaa
Try:
尝试：
img = Image.open(filename)
print(img.format) # 'JPEG'
More info
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