使用 os.stat(文件名) 的存储值

Question

我正在尝试创建一个仅用于教育目的的病毒。我不打算传播它。它的目的是将文件增长到存储空间已满并降低计算机速度的程度。它每 0.001 秒打印一次文件的大小。有了这个，我还想知道它增长文件的速度有多快。下面的代码好像没有让运行:

class Vstatus():
  def _init_(Status):
    Status.countspeed == True
    Status.active == True
    Status.growingspeed == 0

import time
import os
#Your storage is at risk of over-expansion. Please do not let this file run forever, as your storage will fill continuously.
#This is for educational purposes only.

while Vstatus.Status.countspeed == True:
    f = open('file.txt', 'a')
    f.write('W')
    fsize = os.stat('file.txt')
    Key1 = fsize
    time.sleep(1)
    Key2 = fsize
    Vstatus.Status.growingspeed = (Key2 - Key1)
    Vstatus.Status.countspeed = False

while Vstatus.Status.active == True:
     time.sleep(0.001)
     f = open('file.txt', 'a')
     f.write('W')
     fsize = os.stat('file.txt')
     print('size:' + fsize.st_size.__str__() + ' at a speed of ' + Vstatus.Status.growingspeed + 'bytes per second.')

这仅用于教育目的

运行下载文件时我不断遇到的主要错误：

TypeError: unsupported operand type(s) for -: 'os.stat_result' and 'os.stat_result'

这是什么意思？我以为 os.stat 返回了一个整数我可以解决这个问题吗？

Answer 1

Vstatus.Status.growingspeed = (Key2 - Key1)

您不能减去 os.stat 个对象。您的代码还有一些其他问题。您的循环将按顺序运行，这意味着您的第一个循环将尝试估计文件的写入速度，而不向文件写入任何内容。

import time  # Imports at the top 
import os

class VStatus:
    def __init__(self):  # double underscores around __init__
        self.countspeed = True  # Assignment, not equality test
        self.active = True
        self.growingspeed = 0

status = VStatus()  # Make a VStatus instance

# You need to do the speed estimation and file appending in the same loop

with open('file.txt', 'a+') as f:  # Only open the file once
    start = time.time()  # Get the current time
    starting_size = os.fstat(f.fileno()).st_size
    while status.active:  # Access the attribute of the VStatus instance
        size = os.fstat(f.fileno()).st_size  # Send file desciptor to stat
        f.write('W')  # Writing more than one character at a time will be your biggest speed up
        f.flush()  # make sure the byte is written
        if status.countspeed:
            diff = time.time() - start
            if diff >= 1:  # More than a second has gone by
                status.countspeed = False
                status.growingspeed = (os.fstat(f.fileno()).st_size - starting_size)/diff  # get rate of growth
        else:
            print(f"size: {size} at a speed of {status.growingspeed}")

使用 os.stat(文件名) 的存储值

Storage values using os.stat(filename)

operands

python-3.7

这仅用于教育目的