On Mon, 19 Feb 2007 22:17:42 -0800, hiro wrote: > Hey there, I'm currently doing data preprocessing (generating lagged > values for a time series) and I'm having some difficulties trying to > write a file to disk. A friend of mine, wrote this quick example for > me:
If that's a quick example (well over 100 lines), I'd hate to see your idea of a long example. Can you cut out all the irrelevant cruft and just show: (1) the actual error you are getting (2) the SMALLEST amount of code that demonstrates the error Try to isolate if the problem is in *writing* the file or *generating* the time series. Hint: instead of one great big lump of code doing everything, write AT LEAST two functions: one to read values from a file and generate a time series, and a second to write it to a file. That exercise will probably help you discover what the problem is, and even if it doesn't, you'll have narrowed it down from one great big lump of code to a small function. To get you started, here's my idea for the second function: (warning: untested) def write_series(data, f): """Write a time series data to file f. data should be a list of integers. f should be an already opened file-like object. """ # Convert data into a string for writing. s = str(data) s = s[1:-1] # strip the leading and trailing [] delimiters s = s.replace(',', '') # delete the commas # Now write it to the file object f.write(s) f.write('\n') And this is how you would use it: f = file('myfile.txt', 'w') # get some time series data somehow... data = [1, 2, 3, 4, 5] # or something else write_series(data, f) # get some more data data = [2, 3, 4, 5, 6] write_series(data, f) # and now we're done f.close() Hope this helps. -- Steven. -- http://mail.python.org/mailman/listinfo/python-list