converting array to and from string in python 3.7.2

[srm]

I am not able to convert array to string using fromstring() method
my code is:

from array import *
my_char_array = array('c', ['g','e','e','k'])

Error:
Traceback (most recent call last):
  File "<pyshell#1>", line 1, in <module>
    my_char_array = array('c', ['g','e','e','k'])
ValueError: bad typecode (must be b, B, u, h, H, i, I, l, L, q, Q, f or d)