Python


I recently saw someone asking how to bring a window to the front in Windows and I realized I had had some old unreleased code that might help someone with this task. A long time ago, Tim Golden (and possibly some other fellows on the PyWin32 mailing list) showed me how to make windows come to the front on Windows XP. If you’d like to follow along, you will need to download and install your own copy of PyWin32.

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This week we have Facundo Batista (@facundobatista) joining us.

facundobatista

He is a Python Core developer from Argentina. If you happen to speak Spanish, then you might enjoy his blog. Let’s spend some time getting to know Facundo! (more…)

The PyDev of the Week this week is Ben Rousch (@brousch). He is a contributor to the Kivy project. You should check out his blog here. You can also see Mr. Rousch give a talk about Kivy on Youtube. Let’s find out more about him! (more…)

There are several 3rd party packages that wrap Twitter’s API. We’ll be looking at tweepy and twitter. The tweepy documentation is a bit more extensive than twitter’s, but I felt that the twitter package had more concrete examples. Let’s spend some time going over how to use these packages! (more…)

I’ve been hearing some buzz about a newish web service called Twilio which allows you to send SMS and MMS messages among other things. There’s a handy Python wrapper to their REST API as well. If you sign up with Twilio, they will give you a trial account without even requiring you to provide a credit card, which I appreciated. You will receive a Twilio number that you can use for sending out your messages. Since you are using a trail account, you do have to authorize any phone numbers you want to send messages to before you can actually send a message. Let’s spend some time learning how this works!

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My first book, Python 101 is on sale this month. You can get it on Amazon US for $2.99 or you can buy it for 50% off via my website. To get 50% off, just enter the following offer code at checkout: fall2014

Recently I wrote about the arrow project and one of my readers mentioned that another datetime related project known as Delorean. So in this article, we’ll spend some time going over the delorean project. This will be a high level article as there is no reason to rewrite the delorean’s documentation. (more…)

The wxPython GUI toolkit includes its own date / time capabilities. Most of the time, you can just use Python’s datetime and time modules and you’ll be fine. But occasionally you’ll find yourself needing to convert from wxPython’s wx.DateTime objects to Python’s datetime objects. You may encounter this when you use the wx.DatePickerCtrl widget.

Fortunately, wxPython’s calendar module has some helper functions that can help you convert datetime objects back and forth between wxPython and Python. Let’s take a look:

def _pydate2wxdate(date):
     import datetime
     assert isinstance(date, (datetime.datetime, datetime.date))
     tt = date.timetuple()
     dmy = (tt[2], tt[1]-1, tt[0])
     return wx.DateTimeFromDMY(*dmy)
 
def _wxdate2pydate(date):
     import datetime
     assert isinstance(date, wx.DateTime)
     if date.IsValid():
          ymd = map(int, date.FormatISODate().split('-'))
          return datetime.date(*ymd)
     else:
          return None

You can use these handy functions in your own code to help with your conversions. I would probably put these into a controller or utilities script. I would also rewrite it slightly so I wouldn’t import Python’s datetime module inside the functions. Here’s an example:

import datetime
import wx
 
def pydate2wxdate(date):
     assert isinstance(date, (datetime.datetime, datetime.date))
     tt = date.timetuple()
     dmy = (tt[2], tt[1]-1, tt[0])
     return wx.DateTimeFromDMY(*dmy)
 
def wxdate2pydate(date):
     assert isinstance(date, wx.DateTime)
     if date.IsValid():
          ymd = map(int, date.FormatISODate().split('-'))
          return datetime.date(*ymd)
     else:
          return None

You can read more about this topic on this old wxPython mailing thread. Have fun and happy coding!

The other day, I saw an interesting question on StackOverflow where the author asked if there was a way to serialize a Python dictionary into a human-readable format. The answer that was given was to use a package called jsonpickle, which will serialize complex Python objects to and from JSON. This article will give you a quick overview of how to use the project.

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The other day, I came across an article about a fork of the pbs package called sh. These packages are wrappers for Python’s subprocess module. Basically sh allows you to import and use shell commands directly from Python. This article will go over a few examples to show you how to use this fun little library.

Note that at the time of writing, the sh package only supports Linux and Mac. If you need Windows support, then you should try the pbs project.

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