On 04/18/2014 11:06 AM, Guillaume Gay wrote:
Hi,
After updating graph-tool ( to version |2.2.31 (commit 245d1e2c, Thu Mar 27 11:28:39 2014 +0100)|), and a bunch of over things as I passed to Mint 15 to Mint 16, I encounter the following value error, when I manipulates parts of a PropertyMap (through indexing or via the |.fa| attribute (bellow, |dthetas| is an edge propertymap on a graph):
|lower_than = [dthetas.a < -tau/2.] dthetas.a[lower_than] += tau
ValueError: output array is read-only|
Note that the following doesn't rise the error:
| lower_than = [dthetas.a < -tau/2.] dthetas.a[lower_than] = dthetas.a[lower_than] + tau|
It also happen when I filter a graph and do for example |eprop.fa *= 2|
I don't observe this. What numpy version are you using? Do you see the same behavior if you use lower_than = dthetas.a < -tau/2. i.e. without the square brackets? Best, Tiago -- Tiago de Paula Peixoto <tiago@skewed.de>