How can I find the first occurrence of a sub-string in a python string?

Question

So if my string is \"the dude is a cool dude\".
I\'d like to find the first index of \'dude\':

mystring.findfirstindex(\'dude\') # should return 4
         


        

Answer 1

def find_pos(chaine,x):

    for i in range(len(chaine)):
        if chaine[i] ==x :
            return 'yes',i 
    return 'no'