How do you grep through code that lives in many different directories?

python grep plone zope

find DIRECTORY -name "*.py" | xargs grep PATTERN

By the way, since writing this, I have discovered ack, which is a much better solution.

(And since that edit, I have discovered ag).

python grep plone zope

grep -r -n "PATTERN" --include="*.py" DIRECTORY

python grep plone zope

I would strongly recommend ack, a grep substitute, "aimed at programmers with large trees of heterogeneous source code" (from the website)

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