我正在使用Python解决一些练习,并使用unittest自动执行一些代码验证。一个程序运行单个unittest就好了,它通过了。第二个出现以下错误:
$ python s1c6.py
E
======================================================================
ERROR: s1c6 (unittest.loader._FailedTest)
----------------------------------------------------------------------
AttributeError: module '__main__' has no attribute 's1c6'
----------------------------------------------------------------------
Ran 1 test in 0.001s
FAILED (errors=1)
以下是工作脚本的代码:
# s1c5.py
import unittest
import cryptopals
class TestRepeatingKeyXor(unittest.TestCase):
def testCase(self):
key = b"ICE"
data = b"Burning 'em, if you ain't quick and nimble\nI go crazy when I hear a cymbal"
expected = bytes.fromhex(
"0b3637272a2b2e63622c2e69692a23693a2a3c6324202d623d63343c2a26226324272765272a282b2f20430a652e2c652a3124333a653e2b2027630c692b20283165286326302e27282f")
self.assertEqual(expected, cryptopals.xorcrypt(key, data))
if __name__ == "__main__":
unittest.main()
失败脚本的代码:
# s1c6.py
import unittest
import bitstring
import cryptopals
class TestHammingDistance(unittest.TestCase):
def testCase(self):
str1 = b'this is a test'
str2 = b'wokka wokka!!!'
expected = 37
self.assertEqual(expected, hamming_distance(str1, str2))
def hamming_distance(str1, str2):
temp = cryptopals.xor(str1, str2)
return sum(bitstring.Bits(temp))
if __name__ == "__main__":
unittest.main()
我认为这两个程序之间没有根本区别,会导致一个错误,而另一个错误。我错过了什么?
import itertools
import operator
def xor(a, b):
return bytes(map(operator.xor, a, b))
def xorcrypt(key, cipher):
return b''.join(xor(key, x) for x in grouper(cipher, len(key)))
def grouper(iterable, n):
it = iter(iterable)
group = tuple(itertools.islice(it, n))
while group:
yield group
group = tuple(itertools.islice(it, n))
失败脚本的“原始”版本:
# s1c6_raw.py
import cryptopals
key = b"ICE"
data = b"Burning 'em, if you ain't quick and nimble\nI go crazy when I hear a cymbal"
expected = bytes.fromhex(
"0b3637272a2b2e63622c2e69692a23693a2a3c6324202d623d63343c2a26226324272765272a282b2f20430a652e2c652a3124333a653e2b2027630c692b20283165286326302e27282f")
print(cryptopals.xorcrypt(key, data))
以上运行正常并打印预期的输出。
答案 0 :(得分:2)
问题是我以不同的方式运行这两个脚本:
$ python s1c5.py
和
$ python s1c6.py s1c6.txt
由于unittest.main()
解析命令行参数,因此第二种情况中存在错误。如果我将命令行参数传递给第一个程序,我也会得到同样的错误。