python check if list contains value

## checking all elements of list_B in list_A
list_A = [1, 2, 3, 4]
list_B = [2, 3]

check = all(item in list_A for item in list_B)

print(check)
# True

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

if value in list:
  #do stuff

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