how to check if an array contains a value python 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 an element in a list in python

thislist = ["apple", "banana", "cherry"]
if "apple" in thislist:
  print("Yes, 'apple' is in the fruits list")

Example 3: python check if list contains

# To check if a certain element is contained in a list use 'in'
bikes = ['trek', 'redline', 'giant']
'trek' in bikes
# Output:
# True

Example 4: how to check if value is in list python

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

Example 5: 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 6: how to check an array for a value in python

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