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How-to articles, tricks, and solutions about PYTHON

Remove all special characters, punctuation and spaces from string

Here is an example of code that removes all special characters, punctuation, and spaces from a string in Python:

string regex python

Convert list to tuple in Python

You can convert a list to a tuple in Python by using the built-in tuple() function.

python tuples python-2.7

pip uses incorrect cached package version, instead of the user-specified version

Here is an example of how to use pip to install a specific version of a package, rather than using a cached version:

python pip

Finding local IP addresses using Python's stdlib

Here is a code snippet that uses the socket module from Python's standard library to find the local IP addresses of the host machine:

python networking ip-address

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

How do you extract a column from a multi-dimensional array?

In Python, you can extract a column from a multi-dimensional array (e.g.

python arrays multidimensional-array extraction

Pandas DataFrame Groupby two columns and get counts

Here is an example code snippet that demonstrates how to use the groupby() method in pandas to group a DataFrame by two columns and get the counts for each group:

python pandas dataframe

python numpy ValueError: operands could not be broadcast together with shapes

The ValueError: operands could not be broadcast together with shapes error occurs in NumPy when the shapes of the arrays being operated on are incompatible.

python numpy

Printing Lists as Tabular Data

Here is an example of how to print a list of lists (a 2D list) as tabular data using Python:

python

How to urlencode a querystring in Python?

You can use the urllib.parse.urlencode() function to urlencode a querystring in Python.

python urlencode urllib