concatenating along axis - dataframe merges - on index - pivoting - reshaping - transforming data - discretization - dummy variables - filtering outliers - mapping - permutation removing duplicates - renaming axis indexes - replacing values - usda food database example - databases reading and writing to - dataframe data structure arithmetic operations between series and - hierarchical indexing using - merging data with - dates and times (see also time series datadata types for - date ranges datetime type - datetimeindex index object dateutil package date_parser argument date_range function dayfirst argument debug function debuggeripython in ipython - def keyword defaults profiles values for dicts - del keyword delete method delimited formats - density plots - describe method design tips - flat is better than nested keeping relevant objects and data alive overcoming fear of longer files - det function development tools in ipython - debugger - profiling code - profiling function line-by-line - timing code - diag function dicts - creating default values for - dict comprehensions - grouping on - keys for returning system environment variables as diff method difference method digitize function directories bookmarking in ipython changingcommands for discretization - div method divide function dmg file donation statistics by occupation and employer - by state - dot function doublequote option downsampling dpi (dots-per-inchoption dreload function drop method dropna method drop_duplicates method dsplit function dstack function dtype object (see data types"ducktyping in python dummy variables - dumps function duplicated method duplicates indices - removing from data - dynamically-generated functions index www it-ebooks info