python - Pandas sum column with scalar results in zeros -

-

i summing column of pandas dataframe scalar , result column full of zeros. weird thing return zeros , won't. if tell me wouldn't believe it, that's why made video showing result:

https://dl.dropboxusercontent.com/u/15853805/pandas%20bug.mp4

can explain me black magic? loosing trust on pandas , need work.

ok code can similar error:

import pandas pd import numpy np pdb import set_trace pdb  _ in xrange(100):     data = np.random.randint(1,100000,1000000)     df = pd.dataframe(data,columns=['column'])     scalar = np.random.randint(1,100000)     df.column += scalar     if df.column.max()==0:         pdb()

my data variable gets full zeros. memory issues? if data smaller doesn't happen, need process big data in safe way!

>> print pandas.__version__ 0.17.1 >> print numpy.__version__ 1.10.1  python 2.7.11 |anaconda 2.4.1 (64-bit)

the problem version of numexpr=2.4.4 updating numexpr=2.4.6 fixes problem. github issue: https://github.com/pydata/pandas/issues/12167


Comments

Post a Comment

Popular posts from this blog

Hatching array of circles in AutoCAD using c# -

-
i beginner in autocad plugins .i have created array of circle using following code. now, have hatch circles in array .how that??how hatch circles @ once? moreover, how can return hatch method , use hatch objects.sorry language.thanks in advance. [assembly: commandclass(typeof(beamsection.class1))] namespace beamsection { public class class1 { //class1 obj = new class1(); [commandmethod("beamatsupport")] public void addlightweightpolyline() { // current document , database document acdoc = application.documentmanager.mdiactivedocument; database accurdb = acdoc.database; promptpointresult ppr = acdoc.editor.getpoint("\nselect starting point "); var ucs = acdoc.editor.currentusercoordinatesystem; point3d startingpt = ppr.value.transformby(ucs); list<double> radius = new list<double>(); radius.add(0.5); ...
Read more

ios - UITEXTFIELD InputView Uipicker not working in swift -

-
hello trying pop uipickerview view programmatically when user clicks on textfield. have tried doesn't doing anything. isn't working. nothing happening when click textfield class userprofiletableviewcontroller: uitableviewcontroller,uitextfielddelegate,uipickerviewdelegate,uipickerviewdatasource { var itempicker: uipickerview! = uipickerview() @iboutlet weak var gendertxtfield: uitextfield! var gender = ["male","female"] override func viewdidload() { super.viewdidload() gendertxtfield.delegate = self itempicker!.delegate = self itempicker!.datasource = self itempicker!.backgroundcolor = uicolor.blackcolor() self.gendertxtfield.inputview = itempicker } func numberofcomponentsinpickerview(pickerview: uipickerview) -> int{ return 1 } // returns # of rows in each component.. func pickerview(pickerview: uipickerview, numberofrowsincomponent component:...
Read more