How Do I Escape Curly Braces in Python's `.format()` Method?

Escaping Curly Braces in String Formatting with .format()

While using the .format() method for string formatting, it's sometimes necessary to include curly braces within the string. However, the curly braces have a special meaning in the formatting syntax, so to include them literally, they must be escaped.

Problem

A non-working example of including curly braces in a format string using .format() is:

print(" \{ Hello \} {0} ".format(42))

The desired output is:

{ Hello } 42

Solution

Escaping the curly braces by doubling them will allow them to be included in the string as literal text:

x = " {{ Hello }} {0} "
print(x.format(42))

Output:

{ Hello } 42

This modification prevents the curly braces from triggering the replacement field mechanism, allowing them to appear literally in the formatted string.

This escaping rule is outlined in the Python documentation for format string syntax, which states that "brace characters in the literal text, it can be escaped by doubling: {{ and }}."

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