How to check if a specific integer is in a list

You could simply use the in keyword. Like this :

if number_you_are_looking_for in list:
    # your code here

For instance :

myList = [1,2,3,4,5]

if 3 in myList:
    print("3 is present")

Are you looking for this?:

if n in my_list:
    ---do something---

Where n is the number you're checking. For example:

my_list = [1,2,3,4,5,6,7,8,9,0]
if 1 in my_list:
    print 'True'

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