Python for Data Analysis

O

object introspection, Introspection–Introspection

object model, Everything is an object–Everything is an object

object type, Data Types for ndarrays

objectify function, XML and HTML: Web Scraping, Parsing XML with lxml.objectify

objs argument, Concatenating Along an Axis

offsets for time series data, Shifting dates with offsets–Shifting dates with offsets

OHLC (Open-High-Low-Close) resampling, Open-High-Low-Close (OHLC) resampling–Open-High-Low-Close (OHLC) resampling

ols function, Rolling Correlation and Linear Regression

Olson database, Time Zone Handling

on argument, Database-style DataFrame Merges

ones function, Creating ndarrays

open function, Files and the operating system

Open-High-Low-Close (OHLC) resampling, Open-High-Low-Close (OHLC) resampling–Open-High-Low-Close (OHLC) resampling

operators in Python, Binary operators and comparisons–Binary operators and comparisons

or keyword, if, elif, and else

order method, Indirect Sorts: argsort and lexsort

OS X, setting up Python on, Apple OS X–Apple OS X

outer method, ufunc Instance Methods, ufunc Instance Methods, ufunc Instance Methods

outliers, filtering, Detecting and Filtering Outliers–Detecting and Filtering Outliers

output variables, Input and Output Variables–Input and Output Variables