Get the Maximum Length of a Concatenated String with Unique Characters in Python
The problem
Given an array of strings arr. String s is a concatenation of a sub-sequence of arr which have unique characters.
Return the maximum …
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329 articles about python development, tools, and best practices
How to get the last element of a list in Python
Let’s say that you have a Python list with the following 5 foods:
foods = ["pizza", "pasta", "steak", "chicken", …How to embed a web server in your Python3 app
This is not the first time that I created a Python3 application that spat out some output and required access to it via an HTTP server.
While there …
Read Article →How to duplicate zeros in place using Python
Given a fixed length array arr of integers, duplicate each occurrence of zero, shifting the remaining elements to the right.
Note that elements beyond …
Read Article →A Quick Introduction to Asyncio in Python3
Python has never been the best at doing multiple things at the same time.
While there are ways to mostly resolve this, such as using the …
Read Article →How to Reorder Data in Log Files using Python
Let’s say that you have an array or a list, or logs.
Each of these logs is a space-delimited string of words.
For example:
logs = ["dig1 8 …
How to implement a Queue using Stacks in Python
A common programming interview question, and for a change, one that you will actually be able to use in the job, is that of implementing a Queue by …
Read Article →Find positions of largest groups of characters in a String with Python
The question
Take a string S of lowercase letters.
These letters form consecutive groupings of like characters.
Find groups with 3 or more like …
Read Article →How to Measure Execution Time in Google Colab
Google Colab is a fantastic environment to write Python code using Jupyter Notebooks, hosted for free by Google.
If you’ve ever used Jupyter …
Read Article →How to fake a User Agent in Python
A User-Agent is a bunch of text that is sent with every HTTP and HTTPS request. The server processing this request is able to determine what type of …
Read the bottom n lines of a file in Python
Using Operating System Commands in Python
Use the Linux/Mac tail command to provide the data:
line = subprocess.check_output(['tail', …How to make a Python script Pip-installable
As Python developers, we’ve all used pip to install applications, but speaking to other Python developers, it’s not always clear how to …
How to send emails using Python and AWS SES SMTP
Sending emails using Python and AWS’ SES service is really easy. They provide an SMTP server that you can authenticate against and send email …
Read Article →Read the top n lines of a file in Python
Sometimes you may need to read the top n lines of a file using Python.
We start by opening the file for reading and then using a list comprehension we …
Read Article →How Fast is your Website?
I operate a bunch of different sites and have done for many years now.
Some of them get quite a lot of traffic and require a high level of uptime.
To …
Read Article →Learn Golang as a Python Developer
Learning Go or Golang as a Python developer, programmer or software engineer is easier than you think.
While there are quite a lot of things to learn …
Read Article →Get the Amount of Days Between Two Dates in Python
Let’s say that you have two dates:
"2019-01-29"
"2019-06-30"
How would you create a function that would return the number of …
Read Article →How to Always run Python 3 from Bash
Given a directory that contains:
|
|- app.py
|- requirements.txt
|- ...
|- <- other-files ->
|- ...
We can create a runme.sh file to always make …
How to tell if a year is a Leap Year in Python
Given that we are in a leap year this year (2020), it would be nice to know how to programmatically calculate this.
Luckily, this is a repeatable …
Read Article →How to Reverse a Linked List in Python
It’s important to know about data types and one that comes up fairly regularly is that of Linked Lists.
Let’s write the following base …
Read Article →How to package a Python app (pip) for PyPi
In this tutorial, we will create a Python application that can be installed directly from pip that will show the 10 latest blog posts from this …
How to find the longest Palindrome in a String using Python
This occasionally comes up during coding interviews and is actually quite a decent way to test someone’s aptitude of moving back and forth on a …
Read Article →How to get the Maximum Depth of a Binary Tree in Python
Let’s say that you have a binary tree and we needed to know it’s maximum depth.
Binary tree input data [3,9,20,null,null,15,7] could be …
What is Fizz Buzz?
Fizz buzz is a common programming interview question.
The problem statement usually reads something like this:
Read Article →Write a short program that …