Here's the fix. With some explanation afterwords.
# Append '.peek()' after blaze expressions
Quantopian recently upgraded our version of Blaze. Unfortunately, the 'implicit computation' feature has been deprecated. This feature allowed users to enter expressions in familiar pandas-like syntax as below
Now, in this latest version, one needs to explicitly tell Blaze to compute the results by appending the
peek() method. Here is the text from the Blaze site:
The Expr repr method's triggering of implicit computation has been deprecated. Using this aspect of Blaze will trigger a DeprecationWarning in version
0.10, and this behavior will be replaced by a standard (boring) repr implementation in version 0.11. Users can explicitly trigger a computation to see a
quick view of the results of an interactive expression by means of the peek() method.`
It can also be read here https://blaze.readthedocs.io/en/latest/releases.html#release-0-10-0
Sorry for the confusion. See attached notebook.
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