"E1101: Module 'numpy' has no 'float_power' member (no-member)"

[texadactyl]

Step 1 to reproduce

Create source file essai.py:

"""
power versus float_power
"""
import numpy as np

XX1 = np.power(np.pi, 2)
XX2 = np.float_power(np.pi, 2)
print(XX1, XX2)

Step 2 to reproduce

pylint  essai.py

Current behavior

essai.py:7:6: E1101: Module 'numpy' has no 'float_power' member (no-member)

Expected behavior

No diagnostic messages. I believe that pylint misdiagnoses the XX2 assignment. There is, indeed, a float_power function in numpy.

pylint --version output

pylint 2.4.4
astroid 2.3.3
Python 3.7.3 | packaged by conda-forge | (default, Dec  6 2019, 08:54:18) 
[GCC 7.3.0]

[hippo91]

@texadactyl thanks for the report!

[texadactyl]

If you need anything from me, feel free. E.g. experimental pylint.

[texadactyl]

I found the rest of the ufunc discrepancies in pylint/numpy.

from numpy import divmod # <ufunc 'divmod'>
from numpy import gcd # <ufunc 'gcd'>
from numpy import heaviside # <ufunc 'heaviside'>
from numpy import lcm # <ufunc 'lcm'>
from numpy import positive # <ufunc 'positive'>

pylint report:

essai.py:1:0: W0622: Redefining built-in 'divmod' (redefined-builtin)
essai.py:1:0: C0114: Missing module docstring (missing-module-docstring)
essai.py:1:0: E0611: No name 'divmod' in module 'numpy' (no-name-in-module)
essai.py:2:0: E0611: No name 'gcd' in module 'numpy' (no-name-in-module)
essai.py:3:0: E0611: No name 'heaviside' in module 'numpy' (no-name-in-module)
essai.py:4:0: E0611: No name 'lcm' in module 'numpy' (no-name-in-module)
essai.py:5:0: E0611: No name 'positive' in module 'numpy' (no-name-in-module)
essai.py:1:0: W0611: Unused divmod imported from numpy (unused-import)
essai.py:2:0: W0611: Unused gcd imported from numpy (unused-import)
essai.py:3:0: W0611: Unused heaviside imported from numpy (unused-import)
essai.py:4:0: W0611: Unused lcm imported from numpy (unused-import)
essai.py:5:0: W0611: Unused positive imported from numpy (unused-import)

Only the E0611 messages are relevant.

Pity that I was unable to get back to this until today.

[texadactyl]

I used the attached program to extract the ufunc and function definitions out of a given package (E.g. numpy).
pkgfuncs.py.txt

Caveat: It needs more work to process a multi-level package like astropy.

[hippo91]

@texadactyl thank you so much for your investigation. I'll add those missing function into the corresponding brain.
Thanks again.

[hippo91]

@texadactyl i added the missing functions. There are now part of the PR pylint-dev/astroid#738.
Thanks again.