If condition in python in a loop

I am facing difficulty with the correct syntax of the if condition. I want to apply the condition to check the equality of a string. But the way i am trying to do it, is giving me an error:

AttributeError: 'str' object has no attribute 'any'
for :
for a in prod_comm:
    if prod_comm['label']==('label":"neg"}').any():
        prod_pos.append(a)

or :

ValueError: The truth value of a Series is ambiguous. Use a.empty, a.bool(), a.item(), a.any() or a.all().
for :
for a in prod_comm:
    if prod_comm.label==('label":"neg"}'):
        prod_neg.append(a)

What I am trying to do is: have a dataframe with 2 columns- c and label. I want to divide this dataframe into different files based on the type of label, which is either:

label":"neg"}    or     label":"pos"}

How may i go forward with the classification? I guess there is an issue with the syntax i am using, but can't find the correct syntax on the net.

Example dataset:
        comment                                  label
    0   need 3 bhk house                         "label": "neg"}
    2   tried to list my property                "label": "neg"}
    22  i have issue with the map                "label": "neg"}
    24  also help with the rental agreements     "label": "pos"}
    37  sort option should be available.         "label": "pos"}

expected output:
two datasets:
prod_pos - with the comments corresponding to label: "label": "pos"}
prod_neg - with the comments corresponding to label: "label": "neg"}
i.e. 

prod_pos:
    comment                                  label
24  also help with the rental agreements     "label": "pos"}
37  sort option should be available.         "label": "pos"}

prod_neg:
        comment                                  label
    0   need 3 bhk house                         "label": "neg"}
    2   tried to list my property                "label": "neg"}
    22  i have issue with the map                "label": "neg"}

Thanks for your help!