How-to articles, tricks, and solutions about PYTHON

In Python, you can raise an exception using the raise statement.

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

Function decorators allow you to wrap a function in another function.

The super() function is a way to refer to the parent class and its attributes.

The append method adds an item to the end of a list.

To delete a file or folder in Python, you can use the os module and call the os.remove() function to delete a file, or the shutil.rmtree() function to delete a folder and all its contents.

There are several ways to add a delay to your Python program.

There are a few different ways to make a copy of a list in Python:

In Python, you can pass a variable by reference by using the & operator.

In Python, the double star (**) is used to denote an "unpacking" operator, which allows you to unpack a dictionary or other iterable data type into keyword arguments in a function call.

You can use the DataFrame.loc method to select rows from a DataFrame based on column values.

There are a few ways to concatenate lists in Python.

In Python, a default argument is an argument that assumes a default value if a value is not provided in the function call for that argument.

To add a new key-value pair to a dictionary in Python, you can use the update() method or simply assign a value to a new key using square brackets [].

You can use the sorted() function and pass it the dictionary, along with the key parameter set to a lambda function that returns the value from the dictionary.

__init__.py is a special Python file that is used to indicate that the directory it is present in is a Python package.

To copy a file in Python, you can use the built-in "shutil" module.

__str__ and __repr__ are two special methods in Python classes.

To convert a byte object into a string, you can use the decode() method.

In Python, you can catch multiple exceptions in a single except block by separating the exceptions with a tuple.

To get the current time in Python, you can use the datetime module from the standard library.

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

In Python, you can use global variables in a function by declaring the variable as global within the function.

To iterate over a dictionary using a for loop, you can use the .items() method to get a list of the dictionary's keys and values, and then iterate over that list.

To find the index of an item in a list in Python, you can use the index() method of the list.