import-checker: increase portability for python 2.6.x
Before this patch, fromlocalfunc() assumes that "module" attribute of
ast.ImportFrom is None for "from . import a", and Python 2.7.x
satisfies this assumption.
On the other hand, with Python 2.6.x, "module" attribute of
ast.ImportFrom is an empty string for "from . import a", and this
causes failure of test-check-module-imports.t.
--- a/contrib/import-checker.py Fri Jun 17 20:06:09 2016 +0100
+++ b/contrib/import-checker.py Sun Jun 19 02:15:09 2016 +0900
@@ -141,8 +141,8 @@
if prefix:
prefix += '.'
def fromlocal(name, level=0):
- # name is None when relative imports are used.
- if name is None:
+ # name is false value when relative imports are used.
+ if not name:
# If relative imports are used, level must not be absolute.
assert level > 0
candidates = ['.'.join(modulename.split('.')[:-level])]