loops - Python Iterate an integer as long as elements exist in a list -

i have list looks this:

data = [['info', 'numbers', 'more info'], ['info', 'numbers', 'more info'], ['..*this dynamic have hundreds*..']] 

data read in dynamic file , split this, number of elements unknown.

what trying rejoin information ':' between items , store text file per line problem loop iterate through data elements , increment integer used on data list.

here snippet:

#not sure type of loop use here # iterate through data list. savethis = ':'.join(data[n]) file2.write(savethis+'\n') 

thanks

flatten list, then join. itertools.chain.from_iterable() flattening:

from itertools import chain  ':'.join(chain.from_iterable(data)) 

this put : between all items in sublists, writing them out 1 long string.

demo:

>>> itertools import chain >>> ':'.join(chain.from_iterable(data)) 'info:numbers:more info:info:numbers:more info:..*this dynamic have hundreds*..' 

if need sublist each written new line, loop on data:

for sublist in data:     file2.write(':'.join(sublist) + '\n') 

or use nested list comprehension:

    file2.write('\n'.join(':'.join(sublist) sublist in data) + '\n')