use python list comprehension to update dictionary value

Question

I have a list of dictionaries and would like to update the value for key \'price\' with 0 if key price value is equal to \'\'

data=[a[\'price\']=0 for a in          


        

Answer 1

Assignments are statements, and statements are not usable inside list comprehensions. Just use a normal for-loop:

data = ...
for a in data:
    if a['price'] == '':
        a['price'] = 0

And for the sake of completeness, you can also use this abomination (but that doesn't mean you should):

data = ...

[a.__setitem__('price', 0 if a['price'] == '' else a['price']) for a in data]