How to check whether a list have specific value exist or not?

[praba kar]

Dear All
     In Php we can find in_array() function
which function is mainly useful to check
whether a specific value is exist in the array
or not.

   But In python In cannot find any function
like that.  I want to check a list have specific
value or not. So If any one know regarding this
mail me

with regards
PRabahar


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