Comments for scienceoss.com

Comment on Read Excel files from Python by Bill

Bill — Wed, 06 Aug 2008 15:44:10 +0000

Is there a way to read cells in their display format as opposed to their native formats? For example, get the cell content as “$66,777.31″ if the value 66777.31 is formatted as currency.

Comment on Test the speed of your code interactively in IPython by xenocoder

xenocoder — Fri, 25 Jul 2008 19:03:26 +0000

Excellent tutorial! Now I see where the timeit function came from in that example that you used. Really clever and I am sure that this will be helpful in the future!

Comment on Read Excel files from Python by ryan

ryan — Sun, 20 Jul 2008 13:44:16 +0000

John, thanks for xlrd, it’s fantastic.

I made the edits you suggested.

Just checking: is it correct that there is no [supported] way to add content to an existing Excel sheet using xlrd?

-ryan

Comment on Read Excel files from Python by John Machin

John Machin — Sun, 20 Jul 2008 06:08:55 +0000

Hi, Ryan, I’m the author/maintainer of xlrd. Thanks for the advertisement!

One point though, relating to this line in your posting:

sh.put_cell(row, col, ctype, value, xf)

Sheet.put_cell is only for internal use building the sheet contents, it is intentionally not documented and is definitely *not* supported.

Bonus extra point:
cell_C4 = sh.cell(2,3).value
should be
cell_C4 = sh.cell(3, 2).value
or (better)
cell_C4 = sh.cell(rowx=3, colx=2).value

Cheers,
John

Comment on Reorder factors for ggplot by hadley

hadley — Sun, 18 May 2008 21:43:09 +0000

I hope that in a future version you’ll be able to do

ggplot(iris)+aes(x=Sepal.Width)+geom_histogram()+facet_grid(reorder(Species, Sepal.Width) ~.)

directly.

Comment on Calculate sunrise and sunset with PyEphem by ryan

ryan — Sun, 27 Apr 2008 19:16:49 +0000

Xaviar:
Good call. After updating my PyEphem version to the most recent one, I got a warning that the rise_time and set_time attributes are now deprecated, and next_rising and next_setting should be used instead. I’ve updated the post to reflect that change, just like you’ve shown.

Comment on Calculate sunrise and sunset with PyEphem by Xaviar

Xaviar — Sun, 27 Apr 2008 18:45:35 +0000

Thanks for posting this. I needed something similar to this exact information. You could have used the next feature to step through the dates though. for example:

import ephem
import datetime

obs = ephem.Observer()
obs.lat = ‘38.8′
obs.long=’-75.2′

start_date = datetime.datetime(2008,1,1)
end_date = datetime.datetime(2008, 12, 31)
length = (end_date - start_date).days
rise_times = []
set_times = []
count = 0
while count < length:
rise_times.append(obs.next_rising(ephem.Sun()))
set_times.append(obs.next_setting(ephem.Sun()))
count += 1

Comment on Read Excel files from Python by ryan

ryan — Fri, 25 Apr 2008 17:19:47 +0000

@Attila Bleier:
Nice catch, thanks. It’s fixed now.

Comment on Read Excel files from Python by Attila Bleier

Attila Bleier — Fri, 25 Apr 2008 15:56:45 +0000

Please note that the example above has a typo. The 2nd line should be: wb=xlrd.open_workbook(’myworkbook.xls’), because of the namespace.

excellent post, thanks.

Comment on Sort one list by another list by ryan

ryan — Mon, 14 Apr 2008 20:22:03 +0000

Inspired by Andrew I learned some more about using a key function to sort by. My notes are here: http://scienceoss.com/advanced-sorting-sorting-by-key/