Python for Informatics - Chapter 11 - Regular Expressions

All Lectures:

[leootp]

This is the most straight forward and easy to understand tutorial I have watched on regular expression to date. 10 minutes in and I went from having no clue what was going on to a great start at being able to at least imagine my own regexs. My hat goes off to you sir. Thank you.

[ArielMendezValentin]

Thank you Dr Chuck. I'm one of your students in Coursera (Python for Informatics). Now that we completed chapter 10 I will keep going with your videos in YouTube. I started other basic Python courses but your course is the first one I actually completed. Now I feel confident to go deeper into Python. Thanks for your talent and dedication to education.

[maettuify]

Yes, regular expression can sometimes be cryptic. To help analysing them you can use the Regexp::Debugger module from the Perl programming language. It allows you to do live demos on how a regex machine works. It lets you step forwards and backwards through the expression and see what matches and how.

[BiffBifford]

This is the best Python tutorial geared towards extracting data -- I have ever taken! Thank you for the time you put in this well developed tutorial.

[ChuckSeverance]

I am drinking coffee in a University of Michigan coffee cup.   SOMe videos I drink San Pellegrino Lemon or Orange.

[LesCarbonaro]

A not-so-straighforward topic wonderfully explained and brought down to earth by a consummate teacher. Been using regexp for a while, but have not come across such a lucid primer in a while. A great introduction.

[LimeSlimez]

This was more than helpful. Thank you.
I tried to learn this before but it was too boring and ambiguous. You managed to make it crystal clear and quite entertaining, to be honest.
Also i made my own cheat sheet! Thank you.

[TekEffekt]

So much more effective and engaging than the official Python documentation. Thank you.

[costicasan]

I've successfully completed the Python for Informatics course on Coursera. You are an awesome teacher! Stay awesome and keep up the good work!

[abdelkrimbari]

Well explained. I have never seen someone explain this difficult topic. Well done. Thanks for sharing your experience.

[Ralph]

Thank you so much for making these videos! This one finally made sense to me after viewing three times!!!

RegEx is a very complex idea for me, but your explanations made a big difference in helping me to learn it better, after the frustration of viewing 3-4 other videos on the same subject without much luck!

Thanks again for all your work!

Rafael G.

[journeyisseperate]

Fantastic lecture. These videos are a great resource for me.

[benstraub]

Great class!  Lectures are scaffold quite well and the exercises build on each other.  Just wish there were more problems to practice with video answers!!  I took the edx class for Python and it was way over my head...barely made it through.  I wish I had done this class first before the edx class!!  

[alexvass]

"I'm DOWN with reg. ex.!!!" quote of the week!!! awesome

[tejaseervi]

This vdeo lecture really of great help....
Thanks...

[billelbelaidi]

thank you very much, i really appreciate your course

[djsensacion]

I love Regex. I was using it with Perl. So cool !

[grodrigues]

you could simplify even further with something like this.
pat = (\.\d+)', re.I | re.M)

print max(map(float, re.findall(pat, hand.read())))

the re.M flag allows you read through multiple lines all at once (so no more for loop) and the \d matches all digits, just like [0-9]

Great Video. Thanks

[ryanshayegan]

Thanks, it was very helpful, I enjoyed ....

[sanshinron]

If you can match b preceded by a just by using a(b), what's the purpose of positive lookbehind in regexp? I've used regexp before I've started to learn to program and always had to use (?<=a)b. which is positive lookbehind. What's the difference?