list - Files in python are empty for no reason -

i have tried split world generation actual game, since fail it. reason keeps insisting file empty/ variable gained empty, , sometimes, when afterwards, actual program file has emptied text file info, not. here code:

dropbox main code

dropbox world gen

here's small extract of file handling in main code:

world_file = open("c:\users\ben\documents\python files\platformergame files\world.txt", "r") world_file_contents = world_file.read() world_file.close() world_file_contents = world_file_contents.split("\n") world = [] data in world_file_contents:     usable_data = data.split(":")     world.append(tile(usable_data[0],usable_data[1])) 

and tile class:

class tile():     def __init__(self,location,surface):         self.location = location         self.surface = surface 

and error:

traceback (most recent call last):   file "c:\users\ben\documents\python files\platformergame", line 89, in <module>     game.__main__()   file "c:\users\ben\documents\python files\platformergame", line 42, in __main__     world.append(tile(usable_data[0],usable_data[1])) indexerror: list index out of range 

sorry if it's obvious. i'm using pygame.

you have empty lines in input file; want skip these.

you can simplify tile reading code:

with open("c:\users\ben\documents\python files\platformergame files\world.txt", "r") world_file:     world = [tile(*line.strip().split(":", 1)) line in world_file if ':' in line] 

this processes lines if there : character in them, splits once, , creates world list in 1 loop.

as using os.startfile(): starting other script in background. script opens file write , explictly empties file, before generates new data. at same time trying read file. chances end reading empty file @ time, other process hasn't yet finished generating , writing data, , file writes buffered won't see all of data until other process closes file , exits.

don't use os.startfile() at all here. import other file instead; code executed during import , file guaranteed closed.