How to merge all the elements of a list

Question

I have a task to print out all the combinations of 'D' and 'E' in 4 character. What i have:

x = product(['D', 'E'], repeat=4)
p = ''.join(str(s) for s in x)
lxx = []
lxx.append(p)
f = ''.join(lxx)
print(f)

What i get:

('D', 'D', 'D', 'D')('D', 'D', 'D', 'E')('D', 'D', 'E', 'D')('D', 'D', 'E', 'E')('D', 'E', 'D', 'D')('D', 'E', 'D', 'E')('D', 'E', 'E', 'D')('D', 'E', 'E', 'E')('E', 'D', 'D', 'D')('E', 'D', 'D', 'E')('E', 'D', 'E', 'D')('E', 'D', 'E', 'E')('E', 'E', 'D', 'D')('E', 'E', 'D', 'E')('E', 'E', 'E', 'D')('E', 'E', 'E', 'E')

What i need:

DDDD
DDDE
DDED
DDEE
DEDD
DEDE
DEED
DEEE
EDDD
EDDE
EDED
EDEE
EEDD
EEDE
EEED
EEEE

Answer 1

This will work:

from itertools import product

list(product(['D', 'E'], repeat=4))

For pretty printing:

for i in product(['D', 'E'], repeat=4):
    print(''.join(i))

# DDDD
# DDDE
# DDED
# DDEE
# DEDD
# DEDE
# DEED
# DEEE
# EDDD
# EDDE
# EDED
# EDEE
# EEDD
# EEDE
# EEED
# EEEE

Answer 2

from itertools import product
x = product(['D', 'E'], repeat=4)
for word in ["".join(x) for x in list(x)]: print(word)

DDDD
DDDE
DDED
DDEE
DEDD
DEDE
DEED
DEEE
EDDD
EDDE
EDED
EDEE
EEDD
EEDE
EEED
EEEE