# Initializes an empty dictionary:
mydict = dict()
# or
mydict ={}
# Empties a dicionary:
mydict.clear()
dict_empty = {}
dict.clear()
>>> keys = [1,2,3,5,6,7]
>>> {key: None for key in keys}
{1: None, 2: None, 3: None, 5: None, 6: None, 7: None}