How to include the symbol "{" in a Python format string?

Question

How can I include { symbol in a string? My string ``` str2="call_function(Macro, {0});
 \{ 	 int n;
".format("value") ``` I'm getting the error: ``` ValueError: unmatched '{' in format ``` I have escaped the { symbol and have tried without escaping too. I'm getting the same error in both cases.

Accepted Answer

Format strings contain “replacement fields” surrounded by curly braces {}. Anything that is not contained in braces is considered literal text, which is copied unchanged to the output. If you need to include a brace character in the literal text, it can be escaped by doubling: {{ and }}. docs

```
In [1]: '{{{0}'.format('foo')
Out[1]: '{foo'
```

How to include the symbol "{" in a Python format string?

Solution

Problem