Python print basic version info and hostname

Readme.md

Python Numpy array allocation test

Simple check that a system can allocate a large numpy array.

python array_allocate.py

array_allocate.py

#!/usr/bin/env python3
"""
print a few system basics
verify system can allocate a multi-gigabyte array
"""

import numpy as np
import sys
import platform
import socket
import logging

print(platform.node())
print(socket.getfqdn())
print(f"Python {sys.version}")
print(f"Numpy {np.__version__}")

GIB = 1073741824

try:
    import psutil

    avail_memory = psutil.virtual_memory().available
    print(
        f"RAM (GiB): available {avail_memory/GIB:.1f}"
        f" total {psutil.virtual_memory().total/GIB:.1f}"
    )
except ImportError:
    logging.warning(
        """to get RAM info, do (one-time):
    pip install psutil"""
    )

# can the system allocate enough RAM for the desired array
Nx = 1024
Ny = 768
Nz = 512
Np = 3

x = np.empty((Nz, Nx, Ny, Np), dtype=np.float64)

print(f"array shape {x.shape}  memory (GiB) {x.nbytes/GIB:.1f}")