python list of numbers converted to string incorrectly

Question

For some reason, when I do the code...

def encode():
    result2 = []
    print result  
    for x in result:  
        result2 += str(x)  
    print result2

I get...

[123, 456, 789]
['1', '2', '3', '4', '5', '6', '7', '8', '9']

How do I get it to return ['123', '456', '789']?

Thanks!

Answer 1

How about:

result2 = [str(x) for x in result]

The reason you are getting what you are getting is the += is doing list concatenation. Since str(123) is '123', which can be seen as ['1', '2', '3'], when you concatenate that to the empty list you get ['1', '2', '3'] (same thing for the other values).

For it to work doing it your way, you'd need:

result2.append(str(x)) # instead of result2 += str(x)