python check variable in array code example

Example 1: python check array param

isinstance([0, 10, 20, 30], list) 		# True
isinstance(50, list)					# False

Example 2: if string is in array python

if item in my_list:
    # whatever

Example 3: python check array exists

array = [1,2,3,4]
exists_2 = 2 in array
print(exists_2) # True
exists_5 = 5 in array
print(exists_5) # False