Python: How to create concatenated string from dictionary

Question

I want to pass from a dictionary, for example:

defaultdict(int, {'A': 5, 'B': 4, 'C': 4})

to a list like this:

'A5B4C4'

Is there any short and clever way?

Answer 1

You can try this.

''.join(k+str(v) for k,v in d.items())
# 'A5B4C4'

Answer 2

d = defaultdict(int, {'A': 5, 'B': 4, 'C': 4})
yourstring = ''.join(str(e) for t in d.items() for e in t)

Answer 3

Another way of doing this is using reduce function from functools

from functools import reduce

print(reduce(lambda a, b: a + str(b[0]) + str(b[1]), mydict.items(), ''))
>>>'A5B4C4'
# reduce takes 3 params (2 required and an optional initializer which is 3rd parameter '' )