locals()[“x”] = 1

Nah, the locals() or globals() object is much better for this.

In c, nothing and nobody is your friend.

Source: me

In Perl, eval can do similar things, but symbolic references are "better" (I'm fairly sure it's where PHP got the idea, and the syntax, from.) e.g.

$foo = "bar";
$$foo = "potatoes"; # $$foo = access the variable named in $foo, i.e. $bar
print $bar; # prints potatoes

Reading other responses, it seems like Python's globals object is not entirely dissimilar, especially if you know how Perl deals with symbolic references under the hood.

But just because you can doesn't mean you should. If you use strict; in Perl, it will fail to compile most of this nonsense. Use a hash / associative array / dictionary / whatever your language (natural and/or programming) calls them instead.

And I'm pretty sure that even without strict, local variables can't be accessed at all the symbolic way, which is probably for the best. (NB: local is a subtle thing in Perl. By "local" here, I mean the so-called my variables that aren't accessible outside their scope. local variables are actually localised globals. Enjoy that thought.)