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

Yes you can.

You can't use update directly to dict because update is returns nothing and dict is only temporary variable in this case (inside list comprehension), so it will be no affect, but, you can apply it to iterable itself because iterable is persistance variable in this case.

instead of using

[my_dict['k'] = 'v' for my_dict in iterable]  # As I know, assignment not allowed in list comprehension

use

[iterable[i].update({'k': 'v'}) for i in range(len(iterable))]  # You can use enumerate also

So list comprehension itself will be return useless data, but your dicts will be updated.