July 13, 2010 at 10:29 PM by Dr. Drang
As I mentioned last November, I have plain text versions of the Metra commuter rail schedule between Chicago and Naperville (where I live) saved in Simplenote. Metra made some changes to the schedule this week, so I updated and decided to make the files available in a GitHub repository.
On the iPhone, the schedules look like this:
Because Simplenote uses Helvetica, a proportional font, and doesn’t have adjustable tab stops (even if it did, there’s no tab key on the iPhone for entering them), the columns don’t line up perfectly, but they look OK. Until the iPhone gets a decent monospaced font, this will have to do.
There are six schedule files in the repository:
- Eastbound Monday through Friday
- Eastbound Saturday
- Eastbound Sunday
- Westbound Monday through Friday
- Westbound Saturday
- Westbound Sunday
Also in the repository is a Python script,
metra.py, that I wrote to reformat the schedule times from the way they’re presented on the Metra web page.
I copy the schedule times from the box and paste them into a text editor. Generally, I get something that looks like this,
08:40 10:40 12:40 02:40 04:40 06:40 08:40 10:40 12:40 Naperville 09:37 11:37 01:37 03:37 05:37 07:37 09:37 11:37 01:37
which some extra stuff at the beginning of each line that needs to be deleted to make it look like this:
08:40 10:40 12:40 02:40 04:40 06:40 08:40 10:40 12:40 09:37 11:37 01:37 03:37 05:37 07:37 09:37 11:37 01:37
Then I copy those lines and execute
pbpaste | python metra.py | pbcopy
which puts the reformatted schedule,
8:40a 9:37a 10:40a 11:37a 12:40p 1:37p 2:40p 3:37p 4:40p 5:37p 6:40p 7:37p 8:40p 9:37p 10:40p 11:37p 12:40a 1:37a
onto the clipboard. It looks weird here, but that’s because you’re seeing it in a monospaced font, not Helvetica. Finally, I paste the times into the Simplenote webapp and do some minor editing. This usually consists of
- Marking the express trains with an asterisk. I consider any train that takes less than 45 minutes to be an express.
- Sorting the trains by arrival time, rather than departure time. This isn’t necessary, but I find the schedule easier to use when it’s sorted this way. Express trains are usually moved up a slot.
- Fixing the occasional mistaken AM/PM indicator. Metra uses bold text to distinguish PM from AM, which doesn’t translate into a plain text file. The
metra.pyscript uses a very simple test to decide whether a time should be AM or PM, a test that’s almost always right, but isn’t perfect.
1: #!/usr/bin/python 2: 3: import re 4: import sys 5: 6: # Collect the two rows of data. 7: start = sys.stdin.readline().split() 8: stop = sys.stdin.readline().split() 9: 10: # Change leading zeros to two spaces. 11: start = [re.sub(r'^0', ' ', s) for s in start] 12: stop = [re.sub(r'^0', ' ', s) for s in stop] 13: 14: # Print the data as two columns, using a simple heuristic for am/pm. 15: ap = 'a' 16: for i in range(0, len(start)): 17: if start[i][0:2] == '12': 18: if ap == 'a': 19: ap = 'p' 20: else: 21: ap = 'a' 22: 23: print ' %s%s %s%s' % (start[i], ap, stop[i], ap)
The AM/PM test is in Lines 17-21. This works pretty well for the Naperville-Chicago schedule and would probably be OK for other schedules, too. I thought about writing a routine that would work in every case, but it just wasn’t worth the effort. With this simple test, I only had to change a few
If you’re a Simplenote user who lives in Naperville, the schedule files are pretty handy as is. If you’re a Simplenote user who lives in another town on the Chicago-Aurora line, or on another Metra line entirely, you can use
metra.py to create your own Simplenote files.
If you’re not a Simplenote user, you should give it a try. It may be that Jesse Grosjean’s Dropbox-syncing suite of programs will end up working more smoothly, but until that happens, Simplenote is leading the pack.