how to change string into char in python code example

Example 1: how to split a string by character in python

def split(word): 
    return [char for char in word]  
      
# Driver code 
word = 'geeks'
print(split(word)) 

#Output ['g', 'e', 'e', 'k', 's']

Example 2: how to save string characters into char array or list in python

fd = open(filename, 'rU')
chars = []
for line in fd:
    chars.extend(line)