def recognize(self, model):
"""从self.all_format_chunks中取出图片进行识别，需要传入模型路径。
:param model str, 由sklearn生成的模型的路径
:return 四个数字和一个运算符
"""
result = []
for each_img in self.all_format_chunks:
x = Img.classify(each_img, model=model)
result.append(x)
if self.type == '11':
result.insert(2, 0)
result.insert(0, 0)
elif self.type == '12':
result.insert(0, 0)
elif self.type == '21':
result.insert(3, 0)
else:
pass
return result # x1, x2, symbol, x3, x4