python - Writing sublists in a list of lists to separate text files -

i’m new python find myself working on travelling salesman problem multiple drivers. handle routes list of lists i’m having trouble getting results out in suitable .txt format. each sub-list represents locations driver visit, corresponds separate list of lat/long tuples. like:

driver_routes = [[0,5,3,0],[0,1,4,2,0]] lat_long =[(lat0,long0),(lat1,long1)...(latn,longn)] 

what separate .txt file (named “driver(n)”) lists lat/long pairs driver visit.

when working single driver, following code worked fine me:

optimised_locs = open('optimisedroute.txt', 'w') x in driver_routes:     to_write = ','.join(map(str, lat_long[x]))     optimised_locs.write(to_write)     optimised_locs.write("\n")  optimised_locs.close() 

so, took automated file naming code chris gregg here (printing out elements of list separate text files in python) , tried make iterating loop sublists:

num_drivers = 2 p = 0 while p < num_drivers:     x in driver_routes[p]:         f = open("driver"+str(p)+".txt","w")         to_write = ','.join(map(str, lat_long[x]))         print to_write   # testing         f.write(to_write)         f.write("\n")     f.close()     print "break"    # testing     p += 1 

the output on screen looks how expect , generate .txt files correct name. however, 1 tuple printed each file, not list expect. it’s simple can't see why while loop causes issue. appreciate suggestions , thank in advance.

you're overwriting contents of file f on every iteration of for loop because you're re-opening it. need modify code follows open file once per driver:

while p < num_drivers:     f = open("driver"+str(p)+".txt","w")     x in driver_routes[p]:         to_write = ','.join(map(str, lat_long[x]))         print to_write   # testing         f.write(to_write)         f.write("\n")     f.close()     p += 1 

note opening f moved outside for loop.