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How-to articles, tricks, and solutions about PYTHON

'pip' is not recognized as an internal or external command

This error message typically occurs when the command prompt or terminal is not able to find the pip executable.

windows python pip django

"inconsistent use of tabs and spaces in indentation"

"Inkonsistente Verwendung von Tabs und Leerzeichen in Einrückung" is an error message that you may encounter when working with Python code.

python indentation

"Large data" workflows using pandas

Here is an example of a workflow for handling large data using the pandas library:

python pandas mongodb hdf5 large-data

"Least Astonishment" and the Mutable Default Argument

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.

python default-parameters language-design least-astonishment

"pip install unroll": "python setup.py egg_info" failed with error code 1

Here is an example of a command that could cause the error you described:

python package installation pip

"Unicode Error "unicodeescape" codec can't decode bytes... Cannot open text files in Python 3

This error occurs when trying to open a file that contains escape characters (such as \) in the file path, and the escape characters are not being properly interpreted by Python.

python python-3.x unicode

Accessing the index in 'for' loops

To access the index in a 'for' loop in Python, you can use the built-in 'enumerate' function.

list python loops

Add a new item to a dictionary in Python

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

python dictionary items

Adding a legend to PyPlot in Matplotlib in the simplest manner possible

Here is a simple code snippet that demonstrates how to add a legend to a PyPlot in Matplotlib:

python matplotlib plot

Alphabet range in Python

In Python, you can use the string module's ascii_lowercase and ascii_uppercase constants to get the range of lowercase and uppercase letters in the ASCII character set respectively.

string list python alphabet