如何使用Python查找ISO文件的MD5哈希？

How do I find the MD5 hash of an ISO file using Python?

我正在编写一个简单的工具，使我可以快速检查下载的ISO文件的MD5哈希值。这是我的算法：

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import sys
import hashlib

def main():
filename = sys.argv[1] # Takes the ISO 'file' as an argument in the command line
testFile = open(filename,"r") # Opens and reads the ISO 'file'

# Use hashlib here to find MD5 hash of the ISO 'file'. This is where I'm having problems
hashedMd5 = hashlib.md5(testFile).hexdigest()

realMd5 = input("Enter the valid MD5 hash:") # Promt the user for the valid MD5 hash

if (realMd5 == hashedMd5): # Check if valid
print("GOOD!")
else:
print("BAD!!")

main()

当我尝试获取文件的MD5哈希值时，我的问题在第9行。我收到类型错误：支持所需缓冲区API的对象。谁能阐明如何使此功能起作用？

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您需要阅读文件：

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import sys
import hashlib

def main():
filename = sys.argv[1] # Takes the ISO 'file' as an argument in the command line
testFile = open(filename,"rb") # Opens and reads the ISO 'file'

# Use hashlib here to find MD5 hash of the ISO 'file'. This is where I'm having problems
m = hashlib.md5()
while True:
data = testFile.read(4*1024*1024)
if not data: break
m.update(data)
hashedMd5 = m.hexdigest()
realMd5 = input("Enter the valid MD5 hash:") # Promt the user for the valid MD5 hash

if (realMd5 == hashedMd5): # Check if valid
print("GOOD!")
else:
print("BAD!!")

main()

您可能需要以二进制(" rb")打开文件，并以块的形式读取数据块。 ISO文件可能太大而无法容纳在内存中。