From 0073fba449b93aee59ddfca4aabb97102440f360 Mon Sep 17 00:00:00 2001
From: marksibrahim <mark.ibhm@gmail.com>
Date: Wed, 19 Sep 2018 16:22:36 -0400
Subject: [PATCH] faster index removal from another dataframe

---
 modern-pandas/modern-pandas.ipynb | 16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

diff --git a/modern-pandas/modern-pandas.ipynb b/modern-pandas/modern-pandas.ipynb
index 69d2dbb..c38dacc 100644
--- a/modern-pandas/modern-pandas.ipynb
+++ b/modern-pandas/modern-pandas.ipynb
@@ -2,7 +2,7 @@
  "cells": [
   {
    "cell_type": "code",
-   "execution_count": 3,
+   "execution_count": 1,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -14,7 +14,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 4,
+   "execution_count": 2,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -23,7 +23,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 5,
+   "execution_count": 3,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -65,7 +65,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 6,
+   "execution_count": 4,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -608,7 +608,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 7,
+   "execution_count": 5,
    "metadata": {},
    "outputs": [
     {
@@ -719,7 +719,7 @@
        "[2395 rows x 14 columns]"
       ]
      },
-     "execution_count": 7,
+     "execution_count": 5,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -728,9 +728,7 @@
     "bad_flights = flights[flights[\"cancelled\"] == 0]\n",
     "\n",
     "# use index.difference method\n",
-    "good_indices = flights.index.difference(bad_flights.index)\n",
-    "\n",
-    "flights.loc[good_indices]"
+    "flights.drop(bad_flights.index, axis=0)"
    ]
   },
   {