python using list comprehension code example

Example 1: python list comprehension

#example: removing common elements found in `a` from `b`.
a = [1,2,3,4,5]
b = [5,6,7,8,9]
# desired output: [1,2,3,4]

# gets each item found in `a` AND not in `b`
print([i for i in a if i not in b])

Example 2: python list comprehension

h_letters = [ letter for letter in 'human' ]
print( h_letters)