This is a problem I sometimes run into when working with a lot of files simultaneously, where I need three or more `with` statements:
with open('foo') as foo:
with open('bar') as bar:
with open('baz') as baz:
pass
Thankfully, support for multiple items was added in 3.1:
with open('foo') as foo, open('bar') as bar, open('baz') as baz:
pass
However, this begs the need for a multiline form, especially when
working with three or more items:
with open('foo') as foo, \
open('bar') as bar, \
open('baz') as baz, \
open('spam') as spam \
open('eggs') as eggs:
pass
Currently, this works with explicit line continuation, but as all style
guides favor implicit line continuation over explicit, it would be nice
if you could do the following:
with (open('foo') as foo,
open('bar') as bar,
open('baz') as baz,
open('spam') as spam,
open('eggs') as eggs):
pass
Currently, this is a syntax error, since the language specification for
`with` is
with_stmt ::= "with" with_item ("," with_item)* ":" suite
with_item ::= expression ["as" target]
as opposed to something like
with_stmt ::= "with" with_expr ":" suite
with_expr ::= with_item ("," with_item)*
| '(' with_item ("," with_item)* ')'
This is really just a style issue, furthermore a style issue that
requires a change to the languagee grammar (probably, someone who knows
for sure please confirm), so at first I thought it wasn't worth
mentioning, but I'd like to hear what everyone else thinks.
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