Question

I created a Python script with Python2.7 and it works fine. However, when I run the same script with Python2.6, I got a “SyntaxError: invalid syntax” error.

After investigating, the problem seems to be related to a for loop.

l1 = [["a1", "a2"], ["b1", "b2"]]
print {item[0]:item[1] for item in l1}

When I run the above code with Python 2.7, I’ve got the following output:

{'a1': 'a2', 'b1': 'b2'}

When I run the same code with Python 2.6, I’ve got the following error:

>>> l1 = [["a1", "a2"], ["b1", "b2"]]
>>> print {item[0]:item[1] for item in l1}
  File "<stdin>", line 1
    print {item[0]:item[1] for item in l1}
                             ^
SyntaxError: invalid syntax
>>>

Any help is appreciated.

Regards,
Allen

Answer 1

Try this:

print dict(item for item in l1)

Edit about your comment: If you want to explicitly select items, wrap them in a tuple:

print dict((item[1], item[4]) for item in l1)