Pitfall10 The truth value of a Series is ambiguous

The truth value of a Series is ambiguous. Use a.empty, a.bool(), a.item(), a.any() or a.all().; python error::__nonzero__,1537 

def Z_formula(SBP_bestPoint,targetSBP_bestPoint,overShoot_bestpoint,distance_ratio):
    
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ValueError                                Traceback (most recent call last)
~\AppData\Local\Temp\ipykernel_18376\1119397204.py in <module>
----> 1 Z_formula(X_next['how much to trap'],X_next['how much to trap'],X_next['how much to trap'],X_next['how much to trap'])

~\AppData\Local\Temp\ipykernel_18376\769121494.py in Z_formula(SBP_bestPoint, targetSBP_bestPoint, overShoot_bestpoint, distance_ratio)
      8     Z_LM = max(0,1.0 - LM)
      9     diff_marking = abs(distance_ratio-1.0)/3
---> 10     Z_RM = max(0,1.0 - diff_marking/3)
     11     Z_score = Z_LM * 0.75 + Z_RM * 0.25
     12     return Z_score

~\Anaconda3\lib\site-packages\pandas\core\generic.py in __nonzero__(self)
   1525     @final
   1526     def __nonzero__(self):
-> 1527         raise ValueError(
   1528             f"The truth value of a {type(self).__name__} is ambiguous. "
   1529             "Use a.empty, a.bool(), a.item(), a.any() or a.all()."

ValueError: The truth value of a Series is ambiguous. Use a.empty, a.bool(), a.item(), a.any() or a.all().

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Z_formula(X_next['how much to trap'][0],X_next['how much to trap'][0],X_next['how much to trap'][0],X_next['how much to trap'][0])