Check if value has 'is_nan' before calling it

Fixes: #4034
7 years ago · 1451c66a8f
1 changed files with 1 additions and 1 deletions
--- a/lib/util.py
+++ b/lib/util.py
@ -113,7 +113,7 @@ class Fiat(object):
        return 'Fiat(%s)'% self.__str__()

    def __str__(self):
-        if self.value.is_nan():
+        if hasattr(self.value, 'is_nan') and self.value.is_nan():
            return _('No Data')
        else:
            return "{:.2f}".format(self.value) + ' ' + self.ccy