From 0d1bc9fa8a3723c1929138f3b6feb1cfdb478e07 Mon Sep 17 00:00:00 2001 From: Ned Batchelder Date: Fri, 9 Jan 2015 20:10:23 -0500 Subject: Report a more useful error if an expression fails. --- coverage/templite.py | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) (limited to 'coverage') diff --git a/coverage/templite.py b/coverage/templite.py index c2e8981f..c42e380c 100644 --- a/coverage/templite.py +++ b/coverage/templite.py @@ -11,6 +11,11 @@ class TempliteSyntaxError(ValueError): pass +class TempliteValueError(ValueError): + """Raised when an expression won't evaluate in a template.""" + pass + + class CodeBuilder(object): """Build source code conveniently.""" @@ -250,7 +255,12 @@ class Templite(object): try: value = getattr(value, dot) except AttributeError: - value = value[dot] + try: + value = value[dot] + except (TypeError, KeyError): + raise TempliteValueError( + "Couldn't evaluate %r.%s" % (value, dot) + ) if callable(value): value = value() return value -- cgit v1.2.1