t4 provides a handful of functions for operating on the contents of a package in an entry-by-entry manner. These are helpful for performing more complicated parsing operations on the package:
import t4# create a packagep = (t4.Package().set_dir("foo/", "foo/").set("bar", "bar"))# element-wise transform entries, outputting a list# here "lk" is shorthand for "logical_key"# and "entry" is the package entryp.map(lambda lk, entry: entry)# filter out entries not meeting certain criteriap.filter(lambda lk, entry: 'cool' not in lk)
Notice that these functions operate over
(logical_key, entry) tuples. Each
logical_key is a string. Each
PackageEntry object, as would be returned if you slice to a leaf node of the package (e.g.