Python standard library string template

the python standard library includes a module called `string` which provides various string manipulation functions. one useful class within this module is `template`, which allows for simple string substitution.

### tutorial

1. import the `template` class from the `string` module:

2. create a template string with placeholders using `$identifier` or `${identifier}`:

3. provide values for the placeholders using `substitute()` method with a dictionary or keyword arguments:

### code example

### output

### summary

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