[Pytables-users] Table Attributes

[David S. <da...@dr...>]

I am using PyTables 0.8 and am setting a dictionary as an attribute on a
table.
 
When the table is created, I add a dictionary as an attribute of the
table like so:
site.attrs.totalTime = {entry.day: 0}
 
Later I modify the value like so:
Site.attrs.totalTime[entry.day] += timespan
 
After I have done all my processing, I flush the hdf5 file and then
close it. When I open it up and get the table, the site.attrs.totalTime
variable exists, the key I added also exists, but the value is set to 0,
instead of the last value it contained before the last closing. While
modifying the value of the totalTime dictionary I am printing the new
value to the screen for debugging purposes and I am seeing that the
value is being modified. It is odd that it is keeping the table
attribute and the key that is created, but the value of that key in the
dictionary is being lost. I have installed and use pytables 0.7.2 with
my same code and have seen the same issue.
 
Is there something I am doing wrong?
 
Thanks,
David