Import csrtodense and densetocsr function from SciPy module

[KAIRU26]

Hello, I am a beginner with Python. How do I import and use the functions csrtodense and densetocsr contained in SciPy.sparse.sparsetools?

To import sparsetools use

from scipy.sparse import sparsetools

But to use the functions? I tried with:

scipy.sparse.sparsetools.densetocsr (M)

(M is a matrix), but I get:

Traceback (most recent call last):
File "gcm.py", line 43, in <module>
scipy.sparse.sparsetools.densetocsr (M)
NameError: name 'SciPy' is not defined

Any idea?

[MindSpace]

I am not familiar with Python, and so I would not want to give a silly comment or reasons for your problem. But I think if I treat your functions in same manner as Java and C# Import then according to me, you must instantiate the class before using the methods. Did you tried this method, what happened in your case?

[KAIRU26]

For example, to use the amount the cosine function with math module

import math

then write

Math.cos (x)

I thought it was worth the same for csrtodense and densetocsr and then I wrote for analogy. But now I realized that if you import only the cosine function with

from math import cos

and I use

cos (x)

Then, applying what you said, I tried

from scipy.sparse import sparsetools

and wrote:

sparsetools.densetocsr (M)

I got:

Traceback (most recent call last):
File "gcm.py", line 43, in <module>
sparsetools.densetocsr(M)
AttributeError: 'module' object has no attribute 'densetocsr'

I'm going crazy

[$tatic]

If you use the method from / import, then you must not precede the name of the library.

So for example if you use the "import math" you need to use Math.cos (); but if you use "from math import cos" then you only need to use cos () without the "math." in front.