校验是否为图片 py

ALLOWED_EXTENSIONS = set([‘png’,‘jpg’,‘JPG’,‘PNG’,‘gif’,‘GIF’,‘JPEG’,‘jpeg’])
#是否是可以检测的图片类型
def allowed_file(filename):
global basedir, orihtml, imageSize, labels, ALLOWED_EXTENSIONS
return ‘.’ in filename and filename.rsplit(‘.’, 1)[1] in ALLOWED_EXTENSIONS