Printing a percent sign

[Lawrence D'Oliveiro]

In message <1159230293.270822.50390 at d34g2000cwd.googlegroups.com>, John
Machin wrote:

> 1. Reasoning: How do you get a literal "'" into an SQL string constant?
> How do you get a literal "\" into a Python string constant? How do you
> get a literal "$" into some *x shell command lines? Do you detect a
> pattern?

None of which applies to escaping of % characters in format strings.