Simon Willison’s Weblog

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shelmet (via) This looks like a pleasant ergonomic alternative to Python’s subprocess module, plus a whole bunch of other useful utilities. Lets you do things like this:

sh.cmd(“ps”, “aux”).pipe(“grep”, “-i”, check=False).run(“search term”)

I like the way it uses context managers as well: ’with sh.environ({“KEY1”: “val1”})’ sets new environment variables for the duration of the block, ’with sh.cd(“path/to/dir”)’ temporarily changes the working directory and ’with sh.atomicfile(“file.txt”) as fp’ lets you write to a temporary file that will be atomically renamed when the block finishes.