from subprocess import check_output
from os import name as os_name


def os_info():
    if os_name == 'nt':
        return command_to_string(['ver'])
    else:
        return command_to_string(['uname', '-a'])
def cpu_info():
    if os_name == 'nt':
        return command_to_string(['powershell', 'Get-WmiObject', '-class', 'win32_processor'])
    else:
        return read_file("/proc/cpuinfo")

def mem_info():
    if os_name == 'nt':
        return command_to_string(['powershell', 'Get-WmiObject', '-class', 'win32_Physicalmemory'])
    else:
        return read_file("/proc/mem")

def command_to_string(command):
    return check_output(command, shell=True).decode("UTF-8")

def read_file(fileName):
    with open(fileName) as f:
        return f.read()

cpu = cpu_info()
os = os_info()
mem = mem_info()
print(os)
print(cpu)
print(mem)