How-to articles, tricks, and solutions about PYTHON

To parse a YAML file in Python, you can use the yaml library.

You can use the print() function in Python and use the + operator to concatenate a string and a variable.

You can use the random module's choice function to select a random element from a list.

You can use the del statement to remove a key-value pair from a dictionary in Python.

To remove a trailing newline from a string in Python, you can use the rstrip() method.

In Python, you can represent an Enum (enumeration) by using the enum module or by creating a class that inherits from enum.Enum.

To safely create a nested directory in python, you can use the os module and the makedirs function.

You can use the socket module in Python to get the hostname of the system.

Threading is a way to run multiple threads (smaller units of a program) concurrently, in the same process.

You can catch all exceptions by using the Exception class in the except block, like this:

Here is a code snippet that shows how to calculate the Euclidean distance using NumPy:

You can access the ith column of a NumPy multidimensional array by using the following syntax:

You can use the "+" operator to concatenate two strings in Python.

To append to a file in Python, you can use the "a" mode of the built-in open() function.

You can call a function from another .py file by importing the file and then calling the function.

To change the size of figures drawn with Matplotlib in Python, you can use the figure() function and set the figsize argument.

To check the size of a file in Python, you can use the os module to get the size of the file in bytes.

To check if a list is empty in Python, you can use an if statement and the len() function.

There are several ways to measure elapsed time in Python.

In Python, you can check if a variable exists by using the globals() or locals() function to check if the variable is in the global or local namespace, respectively.

You can use the hasattr function to check if an object has an attribute.

You can use the os module to check if a directory exists.

You can use the built-in "pkg_resources" module to check the version of a Python module.

Three approaches to find a file

There are a few ways to check which version of Python is running your script.