In Python, a 2D array is essentially a list of lists. It’s a data structure that allows you to store elements in a table or grid-like format with rows and columns. Each element in the 2D array is accessed using two indices: one for the row and another for the column.
There are several ways to list files in a directory in Python. The most obvious method is to use the os.listdir() function from the built-in os module. This function returns a list of file and directory names in directory with the specified path.
To parse a YAML 1.1 file in Python, use can use the PyYAML library and its safe_load function (for security) or load function (more general use). For YAML 1.2 you can use the ruamel.yaml parser, What is YAML YAML (YAML Ain’t Markup Language or, sometimes, Yet Another Markup Language) is a human-readable data serialization format.
To update a dictionary in Python, you can use the update() method, which merges key-value pairs from another dictionary or any iterable object into the original one. As alternative methods, you can use square bracket notation [], the dict() constructor, or the setdefault() method.
max() is a Python built-in function that returns the maximum value from a sequence, such as a list, tuple, or string. It can also handle multiple iterables, apply a custom key function, and provide a default value for empty sequences.
To unzip a file in Python, you can use the extractall() function from the built-in zipfile module or use the unpack_archive() from the shutil module. Both methods help extract the contents of a zip file. While shutil also works for tar files, you may need specific libraries for other compression formats (gzip, bz2,…).
In Python, a list is a mutable, ordered collection of elements, which can be of different data types. Lists are defined by enclosing the elements in square brackets [] and separating them with commas. Lists support various operations, such as indexing, slicing, appending, and more
Raising Exceptions in Python Syntax: To raise an exception in Python, you use the raise keyword followed by the exception you want to raise. The general syntax is as follows: raise ExceptionType("Optional error message") with ExceptionType: This can be any built-in or user-defined exception class.
To convert a datetime object to a string format in Python, use the datetime.strftime() method with a specified format string. from datetime import datetime # Create a datetime object now = datetime.now() # Convert datetime to string with a specific format formatted_date = now.
To get the current date you can use the date.today() function from the datetime module. This function will return the current date in the YYYY-MM-DD format. To get the current time in Python you can use the datetime.now().time() function from the datetime module.