C:\Users\Aryan\Desktop\heart-host>python app.py
C:\Users\Aryan\AppData\Local\Programs\Python\Python38-32\lib\site-packages\sklearn\utils\deprecation.py:144: FutureWarning: The sklearn.tree.tree module is  deprecated in version 0.22 and will be removed in version 0.24. The corresponding classes / functions should instead be imported from sklearn.tree. Anything that cannot be imported from sklearn.tree is now part of the private API.
  warnings.warn(message, FutureWarning)
Traceback (most recent call last):
  File "app.py", line 5, in <module>
    heart_dtc = pickle.load(open('dtc.pkl', 'rb'))
  File "sklearn\tree\_tree.pyx", line 607, in sklearn.tree._tree.Tree.__cinit__
`ValueError: Buffer dtype mismatch, expected 'SIZE_t' but got 'long long'`