Python: Perform an operation on each dictionary value
Question:
In python 2.6 I want to perform an operation on each dictionary value, for example, I want to multiply by 2 for each of them. How to code less for this task?
Answers:
# Multiply every value in my_dict by 2
for key in my_dict:
my_dict[key] *= 2
for key in d:
d[key] = d[key] * 2
update each key in my_dict:
my_dict.update({n: 2 * my_dict[n] for n in my_dict.keys()})
# A nice one liner (edited to remove square brackets)
my_dict.update((x, y*2) for x, y in my_dict.items())
In python 2.6 I want to perform an operation on each dictionary value, for example, I want to multiply by 2 for each of them. How to code less for this task?
# Multiply every value in my_dict by 2
for key in my_dict:
my_dict[key] *= 2
for key in d:
d[key] = d[key] * 2
update each key in my_dict:
my_dict.update({n: 2 * my_dict[n] for n in my_dict.keys()})
# A nice one liner (edited to remove square brackets)
my_dict.update((x, y*2) for x, y in my_dict.items())