joining string and long in python

Question

I want to join the foll:

col = ('NS', 2013L)

to get:

'NS_2013'

I am doing this:

'_'.join(str(col)), and I get this: "(_'_N_S_'_,_ _2_0_1_3_L_)"

Answer 1

>>> col = ('NS', 2013L)
>>> col
('NS', 2013L)
>>> '%s_%d' % col
'NS_2013'

Answer 2

You need to use string formatting.

>>> col = ('NS', 2013L)
>>> '{}_{}'.format(col[0], col[1])
'NS_2013'

Answer 3

The mistake you are making is in applying the str invocation to the entire col tuple rather than the elements of col:

col = ('NS', 2013L)
'_'.join(str(element) for element in col)

yields:

'NS_2013"

which I believe is what you are after.