What’s New in Python 2.7
What’s New in Python 2.7¶ Author: A.M. Kuchling (amk at amk.ca) This article explains the new features in Python 2.7. Python 2.7 was released on July 3, 2010. Numeric handling has been improved in many ways, for both floating-point numbers and for the Decimal class. There are some useful additions to the standard library, such as a greatly enhanced unittest module, the argparse module for parsing
scipy.arrayで部分行列
pythonの科学計算用ライブラリscipyのarrayの使い方が忘れやすいのでメモ． scipy.arrayを使って行列から部分行列にアクセスする時には， array[ 行開始:行終了, 列開始:列終了 ] または array[ 行開始:行終了 ][ 列開始:列終了 ] ※ だたし，例えばarray[:][0:1]としても列ベクトルは取れない（array[:,0:1]なら大丈夫）ので，前者にそろえるのが良いと思います． とします．省略可能なのは， 開始の0 終了が行か列の最後 ipythonでの実行例： In [1]: import scipy In [2]: a=scipy.array([[11,12,13],[21,22,23],[31,32,33]]) In [3]: a Out[3]: array([[11, 12, 13], [21, 22, 23], [31, 32, 33]
Codeforces
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Pattern Recognition and Machine Learning: Data Sets
