please tell me how to fix this error

[WWWWYYYYAAAA]

NameError Traceback (most recent call last)
~\AppData\Local\Temp\ipykernel_13412\4144211082.py in
56 useCPU = False # @param {type:"boolean"}
57
---> 58 if not is_colab:
59 # If running locally, there's a good chance your env will need this in order to not crash upon np.matmul() or similar operations.
60 os.environ['KMP_DUPLICATE_LIB_OK'] = 'TRUE'

NameError: name 'is_colab' is not defined

[lmagoncalo]

It looks like you forgot to run a previous cell, more specifically the cell 1.2 Prepare Folders