Double curly braces

[tokugawaieneko]

Why do we use double curly braces here?

Other examples in the tutorial use single curly braces.

I feel confused even after reading the explanation saying that "Braces need to be escaped within a Python string, and we do this by using double quotes."
How do we know whether it is a Python string or not? Since almost all the commands in this tutorial is run by python like the one below.

[tri]

I think the reason is related to the format keyword after the Cypher clause.

[david_allen]

Which tutorial are you referring to?

I think this can get confusing because braces are needed for Cypher, but they also have special meaning inside of a python multi-line string.   The double-brace example you gave doesn't look correct to my eye.  The specifics depend on what you're trying to do and which tutorial being followed.