Question

我编写了一个程序来查找大小大于等于100Mb的大文件，
但是，它在MacOS上无休止地运行

我设置了

sentinel = True
while sentinel:

和破坏条件：

sentinel = False

完整代码：

import os, time, shelve, logging
logging.basicConfig(level=logging.DEBUG, format="%(asctime)s - %(levelname)s - %(message)s")
logging.info("Start of Program")
start = time.time()
root = '/'
# errors= set()
# dirs = set()
sentinel = True
while sentinel:
    try:
        root = os.path.abspath(root) #ensure its a abspath
        #set the baseline as 100M 
        #consider the shift
        baseline = 100 * 2**20  # 2*20 is 1M
        #setup to collect the large files
        large_files = []

        #root is a better choise as the a concept
        for foldername, subfolders, files in os.walk(root):
            # logging.error("foldername: %s" %foldername)
            # print("subfolders: ", subfolders)
            for f in files:
                # print(f"{foldername}, {f}")
                abspath = os.path.join(foldername, f)
                logging.debug("abspath: %s" %abspath)
                size = os.path.getsize(abspath)
                if size >= baseline:
                    large_files.append((os.path.basename(abspath), size/2**20))
            # turn_end = time.time()
            # print(f"UnitTimer: {turn_end-start}") #no spaces beween .

        #write the large files to shelf
        logging.debug("subfolders: " + str(subfolders))
        shelf = shelve.open('large_files')
        shelf.clear()
        shelf["large_files"] = large_files
        shelf.close()
        end = time.time()
        logging.debug("Timer: %s." %(end-start))
        #break the while loop
        logging.info("End of Program")
        #break the loop after walk()
        sentinel = False

    except (PermissionError,FileNotFoundError) as e:
        # errors.add(e)
        pass

代码无休止，但我找不到问题。

Answer 1

仅在没有例外的情况下将前哨设置为False。还要确保在您的False块中将其设置为except。

要从错误中正常恢复，您可能不想将每个文件访问都包装在同一try / except块中。相反，您希望有一个小的try / except块来捕获单个文件操作，如果失败，则可以应用错误处理代码（例如重试或记录并继续到下一个文件）。

while循环永远不会停止，甚至不会设置错误的前哨

1 个答案: