当我在colab中执行代码（对象检测）时，demo.py中突然出现错误

Question

我正在使用Google Colab中的遮罩R-CNN进行对象识别。在5天之前，我得到了输出，每个cel都执行了。但是开始重新运行单元时，出现了类似no module named coco的错误；即使我导入了所有内容。谁能帮助我解决这个错误？ 我得到的错误

<ipython-input-21-68065fa967fc> in <module>()
     18 # Import COCO config
     19 sys.path.append(os.path.join(ROOT_DIR, "samples/coco/"))  # To find local version
---> 20 import coco
     21 
     22 get_ipython().magic('matplotlib inline')

ModuleNotFoundError: No module named 'coco'

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