Notes for Session 05¶
A collection of notes to go over in class, to keep things organized.
Issues that came up during the week.¶
git and generated files¶
In general, you don’t want to put generated files in git.
In this case, the letters your mailroom program created.
Caution: be very careful with git add . or git add * – generally better to specifically add the files you now you need.
Style¶
Use PEP8 style – really!
https://www.python.org/dev/peps/pep-0008/
The ONLY exception is if you work in an organization that has a different style guide. It can make sense for your python code to match other code in an organization. But otherwise, use a style consistent with the rest of the Python world.
And don’t use “Hungarian Notation” – it is really non-pythonic, and sometimes actually wrong – and a string called intSomething just adds confusion!
The best way to do this is with a linter in your editor – like the Anaconda package in Sublime. A number of you are getting really annoyed by all the “noise” that the linter creates. But if you keep your code in PEP8 style, it won’t be there!
Minor Issues¶
Remember that:
something in a_dict checks if this is a key
similarly:
for k in dict:
loops through the keys. So no need for:
for k in dict.keys():
Getting an arbitrary key from a dict¶
See arbitrary_key.py in examples/session05
Review of last week’s assignments¶
Mailroom review¶
Anyone up for a review?
Trigrams review¶
Anyone want to look at theirs?
New Assignments¶
Comprehensions¶
It turns out the Comprehensions lab was not in Canvas!
It is now. But let’s take a few mintues to go through it in class:
https://uwpce-pythoncert.github.io/PythonCertDevel/exercises/comprehensions_lab.html
Exceptions¶
Exceptions take a little while to “wrap your head around”.
Shall we do the Excercise together?
https://uwpce-pythoncert.github.io/PythonCertDevel/exercises/except_exercise.html