38. Python Bangla Tutorial for Beginners || Multidimensional Arrays in Python || 2D & 3D Arrays 

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There are many ways in which you can import a module. You can import a particular function from the module as shown below and work with it like any other function. >>> from numpy import arange >>> a = arange(15) >>> a array([ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]) You can import the entire module with a short name as shown below. This enables you to work with all the functions present in the module. >>> import numpy as np >>> a = np.arange(15) >>> a array([ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]) >>> b = np.array([1, 5, 4, 3]) >>> b array([1, 5, 4, 3]) What is the difference between the two methods? If you want to use just one function say arange multiple times then it is advisable to use the first one because it will involve lesser typing compared to the second method where you have to type np.arange() every time. However if you wanted to use multiple functions from the NumPy module then while using the first method you would have to write multiple import statements. And hence the second method is more appealing in such cases. Now comes another method. from numpy import * is a very inadvisable practice while working large amount of codes. But before we go into that. Let me show you how it works. >>> from numpy import * >>> a = arange(15) >>> a array([ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]) >>> b = array([1, 5, 4, 3]) >>> b array([1, 5, 4, 3]) A really handsome deal eh? The goodness of both combined in one. But then let me inform you where the problem will arise. I have used a function by the name of array . But then it is a part of both NumPy and another module by the name of Array. So there is a high probability that two modules might have functions with similar names. Then this might happen. >>> from numpy import * >>> from array import * >>> b = array([1, 5, 4, 3]) Traceback (most recent call last): File "", line 1, in TypeError: must be a unicode character, not list So basically it gave an error because it was adhering to the syntax of array.array while we gave an input having the NumPy module in mind. This might happen several lines of code from the beginning of the file where you have written your import statements. Several days after you wrote this code when you or someone else reads you or the person will have no clue as to which function cropped up from which module. So avoid using the from module_name import * method of importing modules.

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thank u sir .wating for ur next video .wishing u the best .this really so helpful for us .

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very helpful tutorial

Thank you so much...

vai reshape er ghore jei digit gula disen oigular kajta iktu bujhaya dile vao hoto

Vai numpy install korte parcina...problem dekacce pip er karone ki korbo?

What are the difference between ' from numpy import* and import numpy as np'?

IndentationError: unexpected indent ai error ta astese keno brother from numpy import * liksi

Bujhi nai .. bracket e (2,2,3) kon hishebe nisi?

joghonno video