動作環境
GeForce GTX 1070 (8GB)
ASRock Z170M Pro4S [Intel Z170chipset]
Ubuntu 16.04.4 LTS desktop amd64
TensorFlow v1.7.0
cuDNN v5.1 for Linux
CUDA v8.0
Python 3.5.2
IPython 6.0.0 -- An enhanced Interactive Python.
gcc (Ubuntu 5.4.0-6ubuntu1~16.04.4) 5.4.0 20160609
GNU bash, version 4.3.48(1)-release (x86_64-pc-linux-gnu)
scipy v0.19.1
geopandas v0.3.0
MATLAB R2017b (Home Edition)
ADDA v.1.3b6
gnustep-gui-runtime v0.24.0-3.1
PyMieScatt v1.7.0
検討事項
- ゼロ要素のnumpy.arrayを返す
code
test_nparray_zero_elem_180512.py
import numpy as np
wrk = np.array([])
print(wrk.size)
wrk = np.array(None)
print(wrk.size)
print(wrk[0])
run
$ python3 test_nparray_zero_elem_180512.py
0
1
Traceback (most recent call last):
File "test_nparray_zero_elem_180512.py", line 8, in <module>
print(wrk[0])
IndexError: too many indices for array
得られた知見
- numpy.array(None)
- sizeは1になる
- 0番目の要素の出力はエラーになる