How to Selectively Escape Percent Signs (%) in Python String Formatting?

Escaping Percent (%) Selectively in Python Strings

In Python strings, the percent sign (%) is often used for string formatting. However, there are scenarios where you want to selectively escape the percent symbol to use it literally in the string.

Consider the following code snippet:

test = "have it break."
selectiveEscape = "Print percent % in sentence and not %s" % test

print(selectiveEscape)

The expected output is:

Print percent % in sentence and not have it break.

However, the actual result throws an error:

    TypeError: %d format: a number is required, not str

This error occurs because the percent sign inside the formatted string %s tries to interpret test as an integer (%d), but test is a string. To escape the percent sign selectively, we can use double percent signs (%%), as seen in the following code:

test = "have it break."
selectiveEscape = "Print percent %% in sentence and not %s" % test

print(selectiveEscape)

Output:

Print percent % in sentence and not have it break.

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