A lightning talk on Stackful, a pure-Python implementation of dynamically scoped variables for Python https://github.com/erikrose/stackful

1. stackful
Dynamically scoped variables for Python
A ridiculous idea by Erik Rose
erik@mozilla.com
@ErikRose

2. <hack>

3. <hack>

4. In Perl…
sub first {
local $x = 1;
my $y = 1;
second();
}
sub second {
print "x=", $x, "n"; # Prints x=1.
print "y=", $y, "n"; # Doesn't.
}
first();
http://perl.plover.com/local.html

5. In Perl…
sub first {
local $x = 1;
my $y = 1;
second();
}
sub second {
print "x=", $x, "n"; # Prints x=1.
print "y=", $y, "n"; # Doesn't.
}
first();
http://perl.plover.com/local.html

6. In Python…
from stackful import stackful
with stackful('some_global', 8):
foo()

9. https://github.com/erikrose/stackful
erik@mozilla.com
@ErikRose