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Fixing AttributeError & suggesting Alternative solution for Puzzle N53 #49

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Artur-Arstamyan opened this issue Oct 1, 2024 · 0 comments

Artur-Arstamyan commented Oct 1, 2024 •

edited

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AttributeError

Code

from scipy.signal import convolve2d
mine_grid = df.pivot_table(columns='x', index='y', values='mine')
counts = convolve2d(mine_grid.astype(complex), np.ones((3, 3)), mode='same').real.astype(int)
df['adjacent'] = (counts - mine_grid).ravel('F')
df

Output

AttributeError: 'DataFrame' object has no attribute 'ravel'

Fixing using to_numpy()

df['adjacent'] = (counts - mine_grid).to_numpy().ravel('F')

Alternative solution

Code

from numpy.lib.stride_tricks import sliding_window_view
arr = df['mine'].values.reshape(5, 4)
df['adjacent'] = (sliding_window_view(np.pad(arr, 1), window_shape=(3, 3)).sum(axis=(-2, -1))-arr).ravel()
print(df)

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