learn_os.py 文件源码

def main():
    print(os.nice(0))  # get relative process priority
    print(os.nice(1))  # change relative priority
    print(os.times())  # process times: system, user etc...
    print(os.isatty(0))  # is the file descriptor arg a tty?(0 = stdin)
    print(os.isatty(4))  # 4 is just an arbitrary test value
    print(os.getloadavg())  # UNIX only - number of processes in queue
    print(os.cpu_count())  # New in Python 3.4