python list exist value code example

Example 1: python check string not exist in array

arr_test = ["thetung1","thetung2","thetung3"]
title = "thetung"
if title not in arr_test:
	arr_test.append(title)

Example 2: how to check if value is in list python

>>> letters = [a,b,c,d,e]
>>> 'a' in letters:
True

Example 3: how to check an array for a value in python

s = set(a)
if 7 in s:
  # do stuff

Example 4: python find if element in list

element_you_want_to_find in list_in_you_want_to_search
Note: Don't forget to substitute both of that variables with the variables you want

  Conclusion: Use the in operator