'The truth value of a Series is ambiguous if statement in for loop in a function [duplicate]

Why I constantly getting error:

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

I tried a couple of things including bitwise operator. Snippet of the error section of the code below

for i in range(len(df_list)):
    df_list[i] = df_list[i].lower()
    
for item in df.index:
    d = df['StreetName'][item]
    if(d in df_list): 
    #if d in df_list or d in df_list2 :
        df.loc[item,'Clean_status_j'] = 'True'
        df.loc[item,'Clean_status'] = 'True'
    if (d in df_list2):
pythonpandasfor-loop


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