Category: Python

How to debug with logging

Many developers often use print statements for debugging their code. Print statements are a good way to trace and troubleshoot potential problems, but they are not great when working on collaborative projects. Prints are also problematic in multi-threaded programs. You have to remove your print statements before shipping your code …

Create self contained python executables

Every one knows the special file There is another special file If this file exists in a directory, the python interpreter will try to execute it.

Concatenation of strings in Python

Most Python books or blog posts, teach us that concatenating strings using the + sign is a bad idea. This is true: using + or =+ is a really bad idea. In Python, strings are immutable. This means that every time your assign a new value or you want to increase the size …

Python descriptors

Python descriptors have been around for a long time, but probably because of the lack of good documentation they are still not widely used nor understood.

Managing records in python

A simple way to access data from a file or from a database is to read each line or row, then assign each value to a list or a tuple. The data that has been read can then be accessed by its position in the list.

Optimizing your code with __slots__

Python like many other dynamic programming languages can be extended. Objects and definitions can be modified at runtime. This gives the developer great power but this power comes at a price. During the execution two instances of the same object can have different properties. This is why python accesses these …

Heartbeat Code For Cluster Environment

Working in a cluster environment, I often need to check if some of the nodes of my cluster are dead or live. To do so, I have a class called Heartbeat in my Python toolbox. This simple heartbeat class does a ping on the cluster node, and returns True, or …

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