Question

Why am i getting an “invalid syntax” when i run below code. Python 2.7

from string import *

def countSubStringMatch(target,key):
    counter=0
    fsi=0 #fsi=find string index
    while fsi<len(target):
        fsi=dna.find(key,fsi)      
        if fsi!=-1:
           counter+=1
        else:
            counter=0
            fsi=fsi+1
        fsi=fsi+1
    #print '%s is %d times in the target string' %(key,counter)

def countSubStringMatch("atgacatgcacaagtatgcat","atgc")

Answer 1

In the line:

def countSubStringMatch("atgacatgcacaagtatgcat","atgc")

You should remove the def. def is used when defining a function, not when calling it.