使用进度条输出

Question

我对Python非常陌生，并且创建了一个小密码破解程序，它使用强力攻击，我试图让程序运行时输出进度条，这里是什么我至今：

import zipfile 
import sys 
import time 


def progress_bar(sleep_time): 
    for i in range(101): 
     time.sleep(sleep_time) 
     sys.stdout.write("\r[{0}] {1}%".format('#'*(i/10), i)) 
     sys.stdout.flush() 


def obtain_password(path_to_zip_file): 
    password = None 

    zip_file = zipfile.ZipFile(path_to_zip_file) 

    with open('wordlist.txt', 'r') as dict: 
     for line in dict.readlines(): 
      possible = line.strip("\n") 
      try: 
       zip_file.extractall(pwd=possible) 
       password = "Password found {}".format(possible) 
      except: 
        pass 

    return password 

所以我的问题是如何才能得到进度条输出，而obtain_password方法运行？我是否需要稍微改变一下进度条方法？

Answer 1

你试图做的事情是行不通的，你必须记住你只有一个线程。

你可以做什么，是得到你的单词表中的行数，并做数学。顺便说一句，它肯定比定时器更精确。

我没有测试的代码，虽然与这些方针的东西，你会得到你想要什么：

import zipfile 
import sys 
import time 

def obtain_password(path_to_zip_file): 
    password = None 
    zip_file = zipfile.ZipFile(path_to_zip_file) 
    with open('wordlist.txt', 'r') as f: 
     lines = f.readlines() 
     total = len(lines) # get number of lines 
     current = 0 
     for line in lines: 
      current += 1 
      if current % 1000 == 0: # every 1000 lines, shows the progress 
       print('%.2f %%' % float(current/total * 100)) 
      possible = line.strip("\n") 
      try: 
       zip_file.extractall(pwd=possible) 
       #password = "Password found {}".format(possible) 
       print(possible) 
       sys.exit() 
      except: 
       pass 

而且我建议你得到了什么是例外通过extractall提出，把他们捉住正常。 抓住这样的一切：except:不是一个好的做法。

Answer 2

有办法做你的愿望。

1. 让您的密码，黑客在一段时间更新一次进度

   import time 
   
   # Stores the time between updates in seconds. 
   time_between_updates = 10 
   last_update = 0 
   
   def your_expensive_operation(): 
       for i in range(10000000): 
        time.sleep(1)   # Emulate an expensive operation 
        if time.time() - last_update > time_between_updates: 
         print("\r" + (int(i/10000000.0 * 79) * "#"), end='') 
   
   your_expensive_operation() 
   

2. 使用线程

   import time 
   import threading 
   
   # Stores your current position in percent. 
   current_position = 0 
   done = False 
   
   def paint_thread(): 
       while not done: 
        print("\r" + (int(current_position * 79) * "#"), end='') 
        # Make it update once a second. 
        time.sleep(1) 
   
   thread = threading.Thread(target=paint_thread) 
   thread.start() 
   
   for i in range(10000000): 
       time.sleep(1)   # Emulate an expensive operation 
       current_position = i/10000000.0 
   
   done = True