Get EXIF data

from PIL import Image, ExifTags

def getExif(filePath):
    img = Image.open(filePath)

    imageDataList = ["FocalLength", "Model", "ExposureTime", "ISOSpeedRatings",
                     "FNumber", "DateTime", "LensModel"]
    exifDict = {}
    exifDict["imageSize"] = str(img.size[0]) + " - " + str(img.size[1])
    exifDict["imageName"] = os.path.basename(filePath)

    supported = ["tif", "jpg"]
    if not filePath[-3:].lower() in supported:return exifDict

    exif = img._getexif()
    if not exif: return exifDict

    for k, v in exif.items():
        if k in ExifTags.TAGS:
            exifLabel = ExifTags.TAGS[k]
            if exifLabel in imageDataList:
                if exifLabel == "FocalLength":
                    exifDict[exifLabel] = str(v[0])
                else:
                    exifDict[exifLabel] = str(v)

    return exifDict