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Diffstat (limited to 'pym/portage/dep.py')
| -rw-r--r-- | pym/portage/dep.py | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/pym/portage/dep.py b/pym/portage/dep.py index e2eeb6d5b..282fe749d 100644 --- a/pym/portage/dep.py +++ b/pym/portage/dep.py @@ -3,6 +3,16 @@ # Distributed under the terms of the GNU General Public License v2 # $Id$ +__all__ = [ + 'Atom', 'best_match_to_list', 'cpvequal', + 'dep_getcpv', 'dep_getkey', 'dep_getslot', + 'dep_getusedeps', 'dep_opconvert', 'flatten', + 'get_operator', 'isjustname', 'isspecific', + 'isvalidatom', 'match_from_list', 'match_to_list', + 'paren_enclose', 'paren_normalize', 'paren_reduce', + 'remove_slot', 'strip_empty', 'use_reduce' +] + # DEPEND SYNTAX: # # 'use?' only affects the immediately following word! @@ -343,6 +353,28 @@ def dep_opconvert(deplist): x += 1 return retlist +def flatten(mylist): + """ + Recursively traverse nested lists and return a single list containing + all non-list elements that are found. + + Example usage: + >>> flatten([1, [2, 3, [4]]]) + [1, 2, 3, 4] + + @param mylist: A list containing nested lists and non-list elements. + @type mylist: List + @rtype: List + @return: A single list containing only non-list elements. + """ + newlist = [] + for x in mylist: + if isinstance(x, list): + newlist.extend(flatten(x)) + else: + newlist.append(x) + return newlist + class _use_dep(object): __slots__ = ("__weakref__", "conditional", |