how to check if a variable is in a list python code example

Example 1: python check array param

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

Example 2: python check if list contains value

if value in list:
  #do stuff

#Also to check if it doesn't contain
if value not in list:
  #do stuff

Example 3: check if list contains string python

some_list = ['abc-123', 'def-456', 'ghi-789', 'abc-456']
if any("abc" in s for s in some_list):
    # whatever