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Multiple columns index when using the declarative ORM extension of sqlalchemy
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How to add a new row to an empty numpy array
Using standard Python arrays, I can do the following:
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Django FileField with upload_to determined at runtime
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How to speed up insertion performance in PostgreSQL
...and if you are comfortable with binary data.
Here is an example recipe in Python, using psycopg2 with binary input.
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“On-line” (iterator) algorithms for estimating statistical median, mode, skewness, kurtosis?
...ulation of Quantiles and Histograms without Storing Observations in a neat Python module I wrote called LiveStats. It should solve your problem quite effectively. The library supports every statistic that you mention except for mode. I have not yet found a satisfactory solution for mode estimation.
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On localhost, how do I pick a free port number?
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How do you match only valid roman numerals with a regular expression?
...s (requires at least one Roman numeral letter). Should work in PCRE, Perl, Python and Ruby.
Online Ruby demo: http://rubular.com/r/KLPR1zq3Hj
Online Conversion: http://www.onlineconversion.com/roman_numerals_advanced.htm
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How to check whether an object has certain method/property?
... commonplace pattern in pretty much any modern dynamic scripting language (Python, Javascript, VB script, PHP, Lua... I could go on and on). It's not a bug, it's a feature.
– Tim Keating
Dec 3 '11 at 14:36
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GraphViz - How to connect subgraphs?
...'s built-in "label" attribute, which should be set to the empty string (in Python, label='""'). This means I'm no longer adding edges that connect clusters directly, but it works in my particular situation.
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Does SQLAlchemy have an equivalent of Django's get_or_create?
...e updated using a {} as a default value in the function as this is typical Python gotcha. Thanks for the comment, Nigel! If your curious about this gotcha, check out this StackOverflow question and this blog post.
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