How to Make a Directory if Not Exists in Python
If you want to create a directory in Python, but only if it doesn’t exist, you have the following option.
This comes up constantly when writing …
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330 articles about python development, tools, and best practices
Square(n) Sum in Python
The challenge
Complete the square sum function so that it squares each number passed into it and then sums the results together.
For example, for [1, …
How to Fill an Array in Python
The challenge
We want an array, but not just any old array, an array with contents!
Write a function that produces an array with the numbers `` to N-1 …
Retrieve records from MSSQLServer in Python
The below Python code will create a connection to a MSSQLServer instance, and retrieve data from it back into a variable called tblResults.
# use …How to Remove Trailing Zeroes in Python
The challenge
Numbers ending with zeros are boring.
They might be fun in your world, but not here.
Get rid of them. Only the ending ones.
1450 -> …How to use Profilers in Python
When you have performance problems in your Python application, you can use a Profiler to help you.
Step 1: Using cProfile
Your first option is to run …
Read Article →If you can’t Sleep, just count Sheep in Python
The challenge
Given a non-negative integer, 3 for example, return a string with a murmur: "1 sheep...2 sheep...3 sheep...". Input will …
Key-Value CLI Arguments in Python
If you have a CommandLine application (CLI) written in Python, you have a number of ways that you can take arguments from the user.
You could take the …
Read Article →How to use a Translation Table to Replace Characters in Python
Python provides the ability to create Translation Tables.
our_text = "This is an example of some text"
translation_table = …How to Calculate the Sum of all Numbers in a String in Python
Let’s take the following string:
numbers = "this 1 2 3 4 5 is not a 8 9 10"
How can we sum up all the numbers in this string? …
Read Article →Python String Permutations (No itertools)
The quick way: using itertools
Python’s itertools.permutations handles this in one line:
from itertools import permutations
perms = sorted([ …How to Reverse Words or Sentences in Python
Let’s take the following sentence:
words = "These are some words"
We can use slices to reverse the order of the string:
print( …Complete Guide: How to Base64 Encode a String in Python | Python Base64 Encoding Explained
How to Base64 Encode a String in Python: A Comprehensive Guide
Welcome to our comprehensive guide on how to python base64 encode a string in Python. …
How to Get 10 Random Numbers in Python
The random module allows you to generate choices.
import random
print(random.choices([i for i in range(1000)], k=10))
This might give us back …
Read Article →Get the Middle Character in Python
The challenge
Return the middle character of the word. If the word’s length is odd, return the middle character. If the word’s length is …
Read Article →Convert String to Datetime in Python
If you have a string and want to create a Datetime object out of it in Python, then you can use the Datetime Parse Time method, as follows:
from …Multiprocessing Pools in Python
Python ships with a multiprocessing module that allows your code to run functions in parallel by offloading calls to available processors.
In this …
Read Article →How to Double Characters in Python
The challenge
Given a string, you have to return a string in which each character (case-sensitive) is repeated once.
double_char("String") …How to Reverse Words in Python
The challenge
Complete the function that accepts a string parameter, and reverses each word in the string. All spaces in the string should be …
Read Article →How to Count by X in Python
The challenge
Create a function with two arguments that will return an array of the first (n) multiples of (x).
Assume both the given number and the …
Read Article →Calculate the Sum of Pairs in Python
The challenge
Given a list of integers and a single sum value, return the first two values (parse from the left please) in order of appearance that …
Read Article →How to break a list into multiple lists (with maximum size) in Python
If you have a large list and want to create smaller lists of it, with a maximum amount of elements, then:
commands = [str(i) for i in range(100)] …Get all dates between two dates inclusive in Python
If you want to print out a list of all dates between 2 dates (a date range), then you can use the following script:
from datetime import date, …How to Append a Python Dictionary to a Pandas DataFrame
If you want to append a Python dictionary to a Pandas DataFrame, you can do this:
# Create a new DataFrame
output = pd.DataFrame()
# Append the …