I have 2 csv files. I am getting the value of a cell in one csv and comparing with all in another. Below is my code:

```
f = open('test1.csv')
x = open('test2.csv')

csv_f = csv.reader(f)
csv_x = csv.reader(x)

for row in csv_f:
    a = row[1]
    b = row[2]
    for nrow in csv_x:
        if a in nrow[0] and b in nrow[1]:
           print nrow[0]

```

Now the above code only prints for the first value of a and b. Subsequently, it is not going through the 2nd for loop for other values of a and b. Any idea what's the issue?