must contain exactly one single-valued expression, and the left-hand
expression must not be the blank identifier.
</p>

<pre>
a[i] &lt;&lt;= 2
i &amp;^= 1&lt;&lt;n
</pre>

<p>
A tuple assignment assigns the individual elements of a multi-valued
operation to a list of variables.  There are two forms.  In the
first, the right hand operand is a single multi-valued expression

* Fix handling form *path operation* parameters declared with pure classes like `list`, `tuple`, etc. PR [#856](https://github.com/tiangolo/fastapi/pull/856) by [@nsidnev](https://github.com/nsidnev).