[Python] Colab: No such file or directory

I just found a problem about directory making on Colab.

1. 
   First, I checked the current working directory:
   
   import os
   
   !pwd
   >> /content/
2. 
   Then, I created a sub-directory and checked it as follows.
   
   data_path = '/content/kaggle_original_data_cats_dogs'
   !mkdir data_path
   !ls /content/
   >> adc.json datalab data_path sample_data sampleSubmission.csv train.zip

Here, we can see that data_path is the third member of /content/.

1. 
   However, when I tried to change the working directory to data_path, I got:
   
   os.chdir(data_path)
   
   >> FileNotFoundError: [Errno 2] No such file or directory: '/content/kaggle_original_data_cats_dogs'

So far...I can't figure out what just happened? Is there anything wrong with the lines above?

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