[issue39842] partial_format()

[Marco Sulla]

Marco Sulla <launchpad.net at marco.sulla.e4ward.com> added the comment:

> What would "{} {}".partial_format({}) return?
`str.partial_format()` was proposed exactly to avoid such tricks.

> It is not possible to implement a "safe" variant of str.format(),
> because in difference to Template it can call arbitrary code

If you read the documentation of `Template.safe_substitute()`, you can read also this function is not safe at all.

But Python, for example, does not implement private class attributes. Because Python is for adult and consciousness people, no?

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<https://bugs.python.org/issue39842>
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