0

我正在 python 中创建一个 Windows 工具来读取磁盘映像（即 .001 等）并显示文件树和大小等基本信息。为此，我有这个链接，它正在读取.dd扩展磁盘映像。当我尝试使用.001磁盘映像时，它会在读取文件时引发此错误。

# this mathod allows for file upload and it also glues all info received together
def upload_file():
filename = askopenfilename() # takes file and puts it into variable
txt = ""
type_txt = ""
ntfs_exists = False
for partition_no in range(1,5): # only 4 iterations because there is max of 4 partitions 
    txt += "Partition " + str(partition_no) + ": " # create initial string and as it goes, keep adding info
    txt += "Start Sector is " 
    start_txt = partition_start(filename, partition_no) # info where partiton starts
    txt += start_txt
    txt += partition_size(filename, partition_no)  # info what is the size
    type_txt = 'NTFS' #partition_type(filename, partition_no)  # infor what is the type
    txt += "Type is " + type_txt
    txt += "\n" # new space is for another iteration - each iteration is next partition

    if type_txt == 'NTFS':
        ntfs_exists = True
        ntfs_txt = ntfs_info(filename, int(start_txt))

display_info(txt) # in ealier versions this method was called at the very end (after for loop 
ends), but I discovered txt looks nicer that way
display_info("--------------------------------------------") # this makes a nice line under 
partition info so its easier to read other info
if ntfs_exists:
    display_info(ntfs_txt) # ntfs info gets displayed


# this method discovers where partiton starts    
def partition_start(filename, partition_no): # the file and partition no. we investigate gets 
passed
 with open(filename, "rb") as f: # read as binary
    size = 446 + (16*partition_no) # each partiton is 16 bytes. First 466 bytes is the initial 
MBR info
    disk_image = f.read(size) # take the bytes I want to read and put them into variable
    txt = disk_image[-8:-4] # put into variable bytes where info on partition start is stored
    #txt = txt[::-1] # in ealier versions of this program I was using this line to convert to little endian
    txt = int.from_bytes(txt, byteorder='little') # in current version of this program, I use this to convert to little endian

#       if partition_no == 1:
#          fat_info(filename, txt)
     
    return str(txt)

# this method extracts info about partition size
def partition_size(filename, partition_no): # accept disk image and partition no. we investigate
   with open(filename, "rb") as f: # read as binary
    size = 446 + (16*partition_no) # 446 inital bytes + partition we are interested in
    disk_image = f.read(size) 
    txt = disk_image[-4:] # bytes where information is stored
    #txt = txt[::-1] # used before to convert to little endian
    txt = int.from_bytes(txt, byteorder='little') # using this now to convert to little endian
    txt = ", Size is " + str(txt) + " sectors, " # put in nice string format
    return txt

# this method checks for partition type
def partition_type(filename, partition_no):
 with open(filename, "rb") as f:
    size = 446 + (16*partition_no)
    disk_image = f.read(size) 
    txt = disk_image[-12:-11] # bytes where information is stored
    txt = int.from_bytes(txt, byteorder='little') # its a single byte so there is probably no need for this, but left it in case I need it in future
    return check(txt) # check() method takes byte and returns string which is the name of the type

我收到的错误是：

PS C:\Users\hp\Downloads\Basic-Disk-Image-Reader-main\Basic-Disk-Image-Reader-main>  & 
'C:\Users\hp\AppData\Local\Programs\Python\Python310\python.exe' 
'c:\Users\hp\.vscode\extensions\ms-python.python-2021.11.1422169775\pythonFiles\lib\python\debugpy\launcher' '53110' '--' 
'c:\Users\hp\Downloads\Basic-Disk-Image-Reader-main\Basic-Disk-Image-Reader-main\disk_image_reader.py' 
Exception in Tkinter callback
Traceback (most recent call last):
File "C:\Users\hp\AppData\Local\Programs\Python\Python310\lib\tkinter\__init__.py", line 1921, in __call__
return self.func(*args)
File "c:\Users\hp\Downloads\Basic-Disk-Image-Reader-main\Basic-Disk-Image-Reader-main\disk_image_reader.py", line 132, in upload_file
ntfs_txt = ntfs_info(filename, int(start_txt))
File "c:\Users\hp\Downloads\Basic-Disk-Image-Reader-main\Basic-Disk-Image-Reader-main\disk_image_reader.py", line 62, in ntfs_info
disk_image = f.read(size)
MemoryError
PS C:\Users\hp\Downloads\Basic-Disk-Image-Reader-main\Basic-Disk-Image-Reader-main>

MBR 大小、分区大小或分区数是否有任何问题，因为这些都是硬编码的，因为这些都是一般值？

4

0 回答 0