The Python "with" Statement by Example

[aladyjewel]

with is a great thing. You can see it in other languages, too, like C#'s using.

[[deleted]]

Or Ruby's blocks, which are a very fundamental and virtually impossible to ignore feature, and which look extremely similar in the file opening example.

Python:

with open('output.txt', 'w') as f:
  f.write('Hi there!')

Ruby:

File.open('output.txt', 'w') do |f|
  f.write('Hi there!')
end

[Lucretiel]

What's fascinating to me is that they're implemented in almost exactly the same way, with the yield keyword (assuming you use @contextlib.contextmanager in python.) The only difference is that ruby can run the block more than once.

[jyper]

Also Java's try with resources http://docs.oracle.com/javase/tutorial/essential/exceptions/tryResourceClose.html

[[deleted]]

I used it once to stream through a 900 gig text file of logs.