how to combine list elements in python code example

Example 1: combine all items in a list python

>> a = ['a', 'b', 'c']
>> res = "".join(a)
>> print(res)
abc

Example 2: combine list of lists python

x = [["a","b"], ["c"]]

result = sum(x, [])
# This combines the lists within the list into a single list