PythonWise

PEP 562  added support for module level __dir__ and __getitem__ .  __dir__ is called when the built-in dir function is called on the modu...

Typically, you'll read configuration from files (such as YAML) and get them as a dictionary. However in Python you'd like to write c...

Python's dict has a get method . It'll either return an existing value for a given key or return a default value if the key is not i...

I use the command line a lot. Some projects require different settings, say Python virtual environment, GOPATH for installing go packages an...

Say you have a function that converts text and you'd like to test it. You can write a directory with input and output and use pytest.pa...

Python's built-in iter function is mostly used to extract an iterator from an iterable (if you're confused by this, see Raymond...

I'm having fun solving Advent of Code 2017 . Problem 8 reminded the power of Python's eval  (and before you start commenting the ...

I was asked to write a function that generate a power set  of items. At first I wrote a recursive algorithms but then another approach came ...

Sometimes I'd like to know who to ask about a piece of code. I've developed a little Python script that shows the last people who to...

At a current project we're using Google's BigQuery to crunch some petabyte scale data. We have several SQL scripts that we need to ...

Notebook here .

Sometimes we need object pools to limit the number of resource consumed. The most common example is database connnections. In Go  we somet...

Working with GAE , we wanted to create relation diagram from out ndb model . By deferring the rendering to dot  and using Python's refl...

Notebook here .

Working again with AppEngine for Python . Here's a small code snippet that will let you work with your code in the REPL (much better tha...

Sometimes we write "one off" scripts to deal with certain task. However most often than not these scripts live more than just the ...

Sometimes you want to work just with numerical columns in a pandas DataFrame . The rule of thumb is that everything that has a type of objec...

Python's new async/await syntax helps a lot with writing async code. Here's a little utility that provides the async equivalent of ...