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How-to articles, tricks, and solutions about PYTHON

Catch multiple exceptions in one line (except block)

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

python exception exception-handling

Change column type in pandas

In pandas, you can change the data type of a column using the astype() function.

python casting types pandas dataframe

Changing one character in a string

Here is a code snippet that demonstrates how to change a single character in a string in Python:

string python

Changing the tick frequency on the x or y axis

In matplotlib, you can change the tick frequency on the x or y axis of a plot by using the set_xticks() or set_yticks() method of the Axes class.

python matplotlib plot axes xticks

Check if a given key already exists in a dictionary

To check if a given key already exists in a dictionary, you can use the in keyword.

python dictionary

Check if a word is in a string in Python

You can use the in keyword to check if a word is in a string in Python.

string python

Check if something is (not) in a list in Python

In Python, you can check if an item is in a list using the in keyword.

list python conditional membership

Checking whether a variable is an integer or not

In Python, you can check if a variable is an integer using the isinstance() function.

integer python

Class (static) variables and methods

In Python, class variables are variables that are shared by all instances of a class.

class static python class-variables

Combine two columns of text in pandas dataframe

In pandas, you can use the str.cat() function to combine the values of two columns of text into a single column.

python pandas dataframe