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fast pandas selction and indexing

Project description

fastIndex

awesome way to select from pandas multi index and more

Warning! this repository is on early develoapment stage!

installation:

pip install fastindex

configuration:

from fastindex import fast_index
import pandas as pd
#expanding pandas with fastindex
fast_index(pd)

example usage:

setting pandas MultiIndex

df = read_csv("data.csv")
df.set_index(["Country","City","District","first_name","Age","ID"],inplace=True)
df.sort_index(inplace=True)

Basic Selection

  • Regular Pandas:
df.loc[(slice(None),slice(None),slice(None),slice(None),24),:]
  • With fastindex
df.fidx.slice(Age=24)

Ranges

  • Regular Pandas:
df.loc[("Spain",slice(None),slice(None),slice(None),slice(23,25)),:]
  • With fastindex
df.fidx.slice(Age=slice(23,25),Country="Spain")

Selecting columns

  • Regular Pandas:
df.loc[("Spain",slice(None),slice(None),slice(None),slice(23,25)),["last_name"]]
  • With fastindex
df.fidx.slice(Age=slice(23,25),Country="Spain",columns = ["last_name"])

setting values using f_slice:

slc = df.fidx.f_slice(Age=slice(23,25),Country="Spain")
df.loc[slc,"last_name"] = "Leonardo"

Project details


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