How do I check if an input is in a list in python?

Question

I want to be able to enter a value and check if it is in a list and if it is then in the list run a the rest of the program wanted.

a=input('enter value')
b=(1,2,3,4)
c=(5,6,7,8,9)
if a is in b:
   print 'enter in code thats wanted'

Please read [pep-8](http://www.python.org/dev/peps/pep-0008/) on how to format your python code properly. — georg, Jun 25 '12 at 08:32
thanks I have gone through a load of python tutorials and regular look up it on the documentation python — fanjojo, Jun 25 '12 at 14:05

score 16 · Accepted Answer · answered Jun 25 '12 at 08:30

16

You've written it yourself almost correctly, just instead of -

if a is in b:

it should be -

if a in b:

answered Jun 25 '12 at 08:30

theharshest

score 6 · Answer 2 · answered Jun 25 '12 at 08:29

6

condition should be

if a in b:
    print 'enter in code thats wanted'

answered Jun 25 '12 at 08:29

avasal

score 1 · Answer 3 · edited Jun 20 '19 at 13:42

1

in operator: The ‘in’ operator is used to check if a value exists in a sequence or not. Evaluates to true if it finds a variable in the specified sequence and false otherwise.
‘is’ operator: Evaluates to true if the variables on either side of the operator point to the same object and false otherwise.

hence:

if a in b:
    print 'enter in the code that\'s wanted'

edited Jun 20 '19 at 13:42

Azer

answered Jun 20 '19 at 12:44

Tanmesh Shah

score 0 · Answer 4 · answered Sep 15 '21 at 13:34

0

It should be like this ↓

a=input('enter value')
b=(1,2,3,4)
c=(5,6,7,8,9)
if a in b:
print ('enter in code thats wanted')

answered Sep 15 '21 at 13:34

The Mid-End Gamer

4 Answers4