python - Difference between import numpy and import numpy as np -


i understand when possible 1 should use 

import numpy np

this helps keep away conflict due namespaces. have noticed while command below works

import numpy.f2py myf2py

the following not

import numpy np np.f2py #throws no module named f2py

can please explain this?

numpy top package name, , doing import numpy doesn't import submodule numpy.f2py.

when import numpy creats link points numpy, numpy not further linked f2py. link established when import numpy.f2py

in above code:

import numpy np # np alias pointing numpy, @ point numpy not linked numpy.f2py import numpy.f2py myf2py # command makes numpy link numpy.f2py. myf2py alias pointing numpy.f2py

here difference between import numpy.f2py , import numpy.f2py myf2py:

  • import numpy.f2py
    • put numpy local symbol table(pointing numpy), , numpy linked numpy.f2py
    • both numpy , numpy.f2py accessible
  • import numpy.f2py myf2py
    • put my2py local symbol table(pointing numpy.f2py)
    • its parent numpy not added local symbol table. therefore can not access numpy directly

Comments

Post a Comment

Popular posts from this blog

user interface - How to replace the Python logo in a Tkinter-based Python GUI app? -

is there way change default logo, python logo , appears in window's task bar? notice have replaced default tk logo used appear in application window. i using windows 7 , python 2.6 , developing gui of tkinter. you can using winico tk extension package. winico package can used add system tray icons tk programs. the following sample shows 1 way change runtime application icon. note need provide .ico file suitable sizes of icons in on command line , need use pythonw. not change taskbar icon console when running python script. test extracted winico0.6 package python\tcl\winico0.6 folder package require winico work , ran code below using pythonw winico_test.py path\to\some\ico\file.ico . import sys tkinter import * def main(argv): root = tk() root.update() root.tk.call('package','require','winico') id = root.tk.call('winico','createfrom',argv[1]) root.tk.call('winico','setwindow',root,id...
Read more

objective c - Greedy NSProgressIndicator Allocation -

i'm using bunch of nsprogressindicators @ once (32 exact) , looks when they're animating start allocating memory no one's business greedy_run http://i62.tinypic.com/15rgmso.png i've got reports app slowdown , crash after days of uptime, , looks culprit, it's hard pinpoint bugs take days appear. i comment out call start animating, memory behaves expected. result of multiple nsprogressindicators alloc'ed on same thread? or maybe sandboxing? of constant allocations coming core animation threads, don't know else going on. custom nsview progress indicator lives in @interface myview () @property (nonatomic, strong) nsimageview *imageview; @property (nonatomic, strong) nstextview *numbertxt; @property (nonatomic, strong) nsprogressindicator *progress; @end @implementation myview - (id)initwithframe:(nsrect)framerect { self = [super initwithframe:framerect]; if (self) { // image nsimage *image = [nsimage imagenamed:@"bg.png"]; c...
Read more

how to set an OCR language in Google Drive -

i need upload image google drive including ocr feature. the problem setocrlanguage method. need specify hebrew language , based on iso 639-1 codes should "heb". i'm getting response "code" : 400, "errors" : [ { "domain" : "global", "location" : "ocrlanguage", "locationtype" : "parameter", "message" : "invalid value", "reason" : "invalid" } ], any idea should code or can list of avaliable codes?
Read more