How-to articles, tricks, and solutions about PYTHON

In Python, you can use the str.find() method to find the index of the first marker, and the str.rfind() method to find the index of the second marker.

You can filter a Pandas DataFrame using the isin() and ~(not in) methods.

You can use the following code snippet to check which version of TensorFlow is installed in your system:

The "Attempted relative import in non-package" error occurs when attempting to use a relative import within a script that is not part of a package.

The "UnicodeDecodeError: 'ascii' codec can't decode byte" error occurs when trying to decode non-ASCII bytes using the ASCII codec.

In Python, you can use the built-in function attribute __name__ to get the name of a function as a string.

You can use the itertools library in Python to get all possible combinations of a list's elements.

You can use the os.path.abspath() function to get the absolute file path of a file in Python.

You can use the line_count() function from the itertools module to get the line count of a large file cheaply in Python.

To get the ASCII value of a character in Python, you can use the built-in ord() function.

You can use the calendar.monthrange() function from the calendar module in Python to get the last day of a month.

You can use the index() method to get the position of a specific character in a string.

You can use the platform module in Python to identify which operating system the code is running on.

In Python, you can use the import statement to import a module or class from a file within the same directory or a subdirectory.

You can use the built-in list function to create a 2D array (also known as a list of lists) in Python.

To install PIL (Python Imaging Library) using pip on Mac OS, you can use the following command in your terminal:

To install pip with Python 3, you can use the following command:

You can use the iterrows() method to iterate over rows in a Pandas DataFrame.

To leave a Python virtual environment, you can use the deactivate command.

To list all functions in a module, you can use the dir() function to get a list of all the names defined in the module, and then use the inspect module to check if each name is a function.

In order to make a class JSON serializable in Python, you need to define two methods: __init__ and to_json.

To make matplotlib plots show up inline in an IPython notebook, you can use the following code snippet:

In Python, you can use the shutil module to move a file.

To normalize a NumPy array to a unit vector, you can use the numpy.linalg.norm function to calculate the magnitude of the vector, and then divide the array by this magnitude.

One way to overcome "datetime.datetime not JSON serializable" in Python is to use the json.dumps() method with the default argument, default=str, which converts the datetime object to a string before serializing.