Ayla Khan – Data Engineering, DevOps, Code

Python text analysis tools: FuzzyWuzzy’s basic string matching

Published March 29, 2020 in data

The Python FuzzyWuzzy module uses Levenshtein edit distance to implement fuzzy string matching. FuzzyWuzzy’s matching tools return results on a scale from 0 to 100. The simplest matching tool FuzzyWuzzy offers is the ratio(..) function: The basic ratio function works well for simple string matching. However if you’re trying to fuzzy match a single word […]

Tags: data wrangling , nlp , python

Ijson coroutines and generators

Published February 27, 2020 in data

Reader comments on an old post about the ijson parser prompted me to check out the project’s more recent releases. The latest pre-release (v3.0rc1) added a coroutine interface, which allow users to supply their own file readers and have more control over when the parser is called. It looked like a fun feature to explore, […]

Tags: data wrangling , python

Python text analysis tools: Levenshtein Distance

Published January 31, 2020 in data

Figuring out how similar two strings are and then making that similarity a quantitative measurement is a basic problem in text analysis, text mining and natural language processing. There are a number of efficient methods to solve this problem. This survey looks at Python implementations of a simple but widely used method: Levenshtein distance as […]

Tags: data wrangling , nlp , python

A closer look at Airflow’s KubernetesPodOperator and XCom

Published July 11, 2019 in data

The KubernetesPodOperator handles communicating XCom values differently than other operators. The basics are described in the operator documentation under the xcom_push parameter. I’ve written up a more detailed example that expands on that documentation. An Airflow task instance described by the KubernetesPodOperator can write a dict to the file /airflow/xcom/return.json (always the same file) that […]

Tags: airflow , kubernetes , python

Trigger DAG runs with Airflow REST API

Published June 24, 2019 in data

This article and code is applicable to Airflow 1.10.13. Hopefully the REST API will mature as Airflow is developed further, and the authentication methods will be easier. The experimental REST API does not use the Airflow role-based users. Instead, it currently requires a SQLAlchemy models.User object whose data is saved in the database. The code […]

Tags: airflow , python

Useful Airflow on Kubernetes Features

Published June 7, 2019 in data , devops

KubernetesExecutor The KubernetesExecutor sets up Airflow to run on a Kubernetes cluster. This executor runs task instances in pods created from the same Airflow Docker image used by the KubernetesExecutor itself, unless configured otherwise (more on that at the end). Getting Airflow deployed with the KubernetesExecutor to a cluster is not a trivial task. I […]

Tags: airflow , helm , kubernetes , python

SageMaker lifecycle configuration time constraints

Published May 17, 2019 in data

Creating AWS SageMaker Lifecycle configuration scripts to customize notebook instances beats installing packages and making other environment changes in notebook instances. One advantage is that the customization code doesn’t need to be copied from notebook to notebook. Another is that the lifecycle configurations are managed outside of and separately from notebook instances, and can be […]

Tags: aws , python

Customize Yellowbrick color palettes

Published January 16, 2019 in data

I’m starting to experiment with the Yellowbrick machine learning visualizer tools to learn how to visualize models more effectively. The documentation is good, and getting started with the tools is pretty straightforward. I started to get bored with the default color palette after playing with some of the basic visualization examples in the documentation (more […]

Tags: python , visualization , yellowbrick

New EC2 launch template version

Published January 8, 2019 in devops

The AWS web console is not always intuitive to navigate and the documentation can be opaque. I recently had to edit an EC2 launch template, which is only possible by creating a new version and then making the new version the default used by the autoscale group. Here are the steps to create a new […]

Tags: aws

Python comprehension fun!

Published November 15, 2018 in programming

List comprehensions are an extremely useful and optimized idiomatic Python language feature for manipulating and returning data stored in lists (or any iterable type). The Python 3 docs describe how to use basic and nested list comprehensions. Advanced nested list comprehensions If I wanted to clean some text by removing stop words and generate lists […]

Tags: python

1 2 3 Next »