def __str__(self):
if self.base.get_nvalue() > 1:
values = (self.base.mean(), self.base.stdev(),
self.changed.mean(), self.changed.stdev())
text = "%s +- %s -> %s +- %s" % self.base.format_values(values)
msg = significant_msg(self.base, self.changed)
delta_avg = quantity_delta(self.base, self.changed)
return ("Mean +- std dev: %s: %s\n%s"
% (text, delta_avg, msg))
else:
format_value = self.base.format_value
base = self.base.mean()
changed = self.changed.mean()
delta_avg = quantity_delta(self.base, self.changed)
return ("%s -> %s: %s"
% (format_value(base),
format_value(changed),
delta_avg))
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