pandas - Merge multiple columns into one column list with [key:value] combination in Python -


let me preface question noting combined column not dictionary. resulting dataframe has square brackets within 'combined' column - appears list within dataframe int format [key1:value1, key2:value2, etc].

i'm trying convert dataframe this:

import pandas pd test = pd.dataframe({'apples':['red','green','yellow'], 'quantity': [1,2,3],'tastefactor':['yum','yum','yuck']})     apples  quantity tastefactor 0     red         1         yum 1   green         2         yum 2  yellow         3        yuck

to format, combining keys values in each row new column:

   apples  quantity tastefactor  combined 0     red         1         yum  ['apples':'red','quantity':'1','tastefactor':'yum'] 1   green         2         yum  ['apples':'green','quantity':'2','tastefactor':'yum'] 2  yellow         3        yuck  ['apples':'yellow','quantity':'3','tastefactor':'yuck']

tried turn dataframe dictionary per row, got stuck converting list.

test['combined'] = test.to_dict(orient='records')

the resulting new column doesn't need actual list type. string.

previously asked question here wanted clarify question in title in question. how create list dictionary within dataframe in python

found following closely related questions , tried derivations of them gets me half way can't seem right format.

you can using apply method of pandas dataframes

import pandas pd df = pd.dataframe({'apples':['red','green','yellow'], 'quantity': [1,2,3],'tastefactor':['yum','yum','yuck']})  col_names = df.columns  def func(row):     global col_names     list_ = [str(b)+':'+str(a) a,b in zip(row,col_names.values.tolist())]     return list_  x = list(map(func, df.values.tolist())) df.loc[:,'combined'] = pd.series(x) # df #    apples  quantity tastefactor                                       combined # 0     red         1         yum      [apples:red, quantity:1, tastefactor:yum] # 1   green         2         yum    [apples:green, quantity:2, tastefactor:yum] # 2  yellow         3        yuck  [apples:yellow, quantity:3, tastefactor:yuck]

Comments

Post a Comment

Popular posts from this blog

python Tkinter Capturing keyboard events save as one single string -

is possible store keyboard events 1 string? code below stores 1 char , prints it. card reader or bar code reader, contains collection of character/ string not 1 character @ time. goal save char pressed text variable. from tkinter import * root = tk() def key(event): text= event.char text+= event.char print ("pressed", text) def callback(event): frame.focus_set() print ("clicked at", event.x, event.y) frame = frame(root, width=100, height=100) frame.bind("<key>", key) frame.bind("<button-1>", callback) frame.pack() root.mainloop() currently, creating text variable , everytime key() function gets called, , text stores last character typed. you can define text module level variable , , use module level text inside key function - text = '' def key(event): global text text+= event.char print("pressed", text)
Read more

android - InAppBilling registering BroadcastReceiver in AndroidManifest -

i'm implementing inapp billing in android app. works well, however, i'm trying decouple broadcast receiver activity manifest. suggestion in android's trivialdrive sample: // important: dynamically register broadcast messages updated purchases. // register receiver here instead of <receiver> in manifest // because call getpurchases() @ startup, therefore can ignore // broadcasts sent while app isn't running. // note: registering listener in activity bad idea, done here // because sample. regardless, receiver must registered after // iabhelper setup, before first call getpurchases(). currently there's class extends broadcastreceiver : public class iabbroadcastreceiver extends broadcastreceiver { /** * intent action receiver should filter for. */ public static final string action = "com.android.vending.billing.purchases_updated"; private final iabbroadcastlistener mlistener; public iabbroadcastreceiver(iabbroadcastlistener listener) { m
Read more

javascript - Z-index in d3.js -

i have map , when hover effect on region of map below yellow line , circle, last ones disappear. how can solve problem? http://jsfiddle.net/ot21n9qx/ var arc = g.append("path") .style("fill", "none") .style("stroke", "yellow") .style("stroke-width", 2) .attr("d", "m" + pathorigin[0] + "," + pathorigin[1] + " q" + svgpoint[0] + "," + pathorigin[1] + " " + svgpoint[0] + "," + svgpoint[1]); var circlesize = d3.scale.linear() .domain([0, 0.5, 1]) .range([4, 10, 4]); svg not have z order draws objects in order created. need create path , circle after create highlight regions. here forked fiddle: http://jsfiddle.net/o00fzgaf/1/
Read more