How to reset all values in a dictionary

Question

{"green": 0, "y3": 1, "m@tt": 0, "newaccount": 0, "egg": 0, "results": 0, "dan": 0, "Lewis": 0, "NewAccount2": 0, "testyear3": 1, "testyear6": 0, "NewAccount1": 0, "testyear4": 0, "testyear5": 0, "Matt1": 0, "swag": 1, "lewis": 1, "matt": 1, "notin": 0}

this is the dictionary defined as 'completeddict'. What I want to do, is to change ALL values no matter what they are called to 0. However bear in mind that new account names will be added at any point as 'keys' so I cannot manually do "completeddict[green] = 0", "completeddict[lewis] = 0", etc etc.

Is there any way to have python change ALL values within a dictionary back to 0?

EDIT: Unfortunately I do not want to create a new dictionary - I want to keep it called 'completeddict' as the program needs to use the dictionary defined as 'completeddict' at many points in the program.

Answer 1

Another option is to use .fromkeys():

fromkeys(seq[, value])

Create a new dictionary with keys from seq and values set to value.

d = d.fromkeys(d, 0)

Demo:

>>> d = {"green": 0, "y3": 1, "m@tt": 0, "newaccount": 0, "egg": 0, "results": 0, "dan": 0, "Lewis": 0, "NewAccount2": 0, "testyear3": 1, "testyear6": 0, "NewAccount1": 0, "testyear4": 0, "testyear5": 0, "Matt1": 0, "swag": 1, "lewis": 1, "matt": 1, "notin": 0}
>>> d.fromkeys(d, 0)
{'newaccount': 0, 'swag': 0, 'notin': 0, 'NewAccount1': 0, 'Matt1': 0, 'testyear4': 0, 'Lewis': 0, 'dan': 0, 'matt': 0, 'results': 0, 'm@tt': 0, 'green': 0, 'testyear5': 0, 'lewis': 0, 'NewAccount2': 0, 'y3': 0, 'testyear3': 0, 'egg': 0, 'testyear6': 0}

Answer 2

If you don't want to create a new dict, it seems like all you need is a simple two-line loop, unless I'm missing something:

for key in completeddict.keys():
    completeddict[key] = 0