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Improve QtValueError wording for ensure_not_null.

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This commit is contained in:
Florian Bruhin 2015-05-25 01:21:57 +02:00
parent 8d15bbdded
commit 120d2e12b0
1 changed files with 6 additions and 3 deletions
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9
qutebrowser/utils/qtutils.py
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@ -131,7 +131,7 @@ def ensure_valid(obj):
def ensure_not_null(obj):
"""Ensure a Qt object with an .isNull() method is not null."""
if obj.isNull():
raise QtValueError(obj)
raise QtValueError(obj, null=True)
def check_qdatastream(stream):
@ -322,12 +322,15 @@ class QtValueError(ValueError):
"""Exception which gets raised by ensure_valid."""
def __init__(self, obj):
def __init__(self, obj, null=False):
try:
self.reason = obj.errorString()
except AttributeError:
self.reason = None
err = "{} is not valid".format(obj)
if null:
err = "{} is null".format(obj)
else:
err = "{} is not valid".format(obj)
if self.reason:
err += ": {}".format(self.reason)
super().__init__(err)