futurewarning: the behavior of array concatenation with empty entries is deprecated

[fatalfeel]

in python 3.12 happen, fixed as follows

avoid FutureWarning: The behavior of array concatenation with empty entries is deprecated

'''all_predicted_probs = pd.concat([all_predicted_probs, predicted_probs], ignore_index=True)
all_testing_y = pd.concat([all_testing_y, self.testing_y])'''
if all_predicted_probs.empty:
all_predicted_probs = predicted_probs.copy()
else:
all_predicted_probs = pd.concat([all_predicted_probs, predicted_probs])

if all_testing_y.empty:
all_testing_y = self.testing_y.copy()
else:
pd.concat([all_testing_y, self.testing_y])

dates.extend(self.full_df['Dates'].loc[self.pred_indices])

'''all_predicted_probs = pd.concat([all_predicted_probs, predicted_probs], ignore_index=True)
all_testing_y = pd.concat([all_testing_y, self.testing_y])'''
if all_predicted_probs.empty:
all_predicted_probs = predicted_probs.copy()
else:
all_predicted_probs = pd.concat([all_predicted_probs, predicted_probs])

if all_testing_y.empty:
all_testing_y = self.testing_y.copy()
else:
all_testing_y = pd.concat([all_testing_y, self.testing_y])

dates.extend(self.full_df['Dates'].loc[self.cv_indices])