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How-to articles, tricks, and solutions about PYTHON

How to search and replace text in a file?

There are several ways to search and replace text in a file, depending on the programming language you are using.

file string replace python python-3.x

What is the maximum recursion depth in Python, and how to increase it?

The maximum recursion depth in Python is typically 1000, although this can vary depending on the operating system and system settings.

python recursion

Why does code like `str = str(...)` cause a TypeError, but only the second time?

Code like str = str(...) causes a TypeError because it attempts to re-assign the built-in str type to a new value, which is not allowed.

python typeerror callable

How to clear the interpreter console?

There are a few ways to clear the interpreter console in Python, depending on the specific environment you are using.

console windows python

Reading JSON from a file

Here is an example of reading a JSON file in Python:

json python

How to add an empty column to a dataframe?

In pandas, you can add an empty column to a DataFrame using the assign() method or the insert() method.

python pandas

What is the quickest way to HTTP GET in Python?

Here's a code snippet for making an HTTP GET request using the requests library in Python:

http python networking

How to normalize a NumPy array to a unit vector?

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.

python numpy scikit-learn statistics normalization

Pandas index column title or name

To set the name of the index column in a pandas DataFrame, you can use the .rename_axis() method or the .index.name attribute.

python pandas dataframe columnname

How do I find out my PYTHONPATH using Python?

You can use the sys module in Python to access the sys.path variable, which contains a list of directories that Python looks in for modules to import.

python python-module pythonpath