创建一个依赖于情况的字典（hashlib）

Question

以下代码是一个更大项目的一部分：

# Todo: automatically generate dict based
# on hashlib.algorithms_available
algorithms = {"md5":hashlib.md5,
              "sha1":hashlib.sha1,
              "sha224":hashlib.sha224,
              "sha256":hashlib.sha256,
              "sha384":hashlib.sha384,
              "sha512":hashlib.sha512,
              "sha3_224":hashlib.sha3_224,
              "sha3_256":hashlib.sha3_256,
              "sha3_384":hashlib.sha3_384,
              "sha3_512":hashlib.sha3_512,
            }
self.algo, algorithms = algorithms[self.algo], None

我正在尝试使用 hashlib 的 algorithms_available (hashlib.algorithms_available) 来创建一个自定义字典，依赖于系统。 key:value 对应该像 《algorithm name》: hashlib.《algorithm》，但我想不通。

Answer 1

您可以使用 hashlib.new 获取算法对象并创建字典，遍历 hashlib.algorithms_available。

像这样 -

In : algorithms = {algo:hashlib.new(algo) for algo in hashlib.algorithms_available}

In : algorithms
Out:
{'DSA': <DSA HASH object @ 0x103e824b0>,
 'DSA-SHA': <DSA-SHA HASH object @ 0x103e8ac70>,
 'MD4': <MD4 HASH object @ 0x102e55470>,
 'MD5': <MD5 HASH object @ 0x103e9ddf0>,
 'MDC2': <MDC2 HASH object @ 0x103eeebb0>,
 'RIPEMD160': <RIPEMD160 HASH object @ 0x104012ef0>,
 'SHA': <SHA HASH object @ 0x103c99af0>,
 'SHA1': <SHA1 HASH object @ 0x103ef32f0>,
 'SHA224': <SHA224 HASH object @ 0x1040123b0>,
 'SHA256': <SHA256 HASH object @ 0x103e9d6f0>,
 'SHA384': <SHA384 HASH object @ 0x103ef02b0>,
 'SHA512': <SHA512 HASH object @ 0x103e9d2b0>,
 'dsaEncryption': <dsaEncryption HASH object @ 0x1040120f0>,
 'dsaWithSHA': <dsaWithSHA HASH object @ 0x103e82a30>,
 'ecdsa-with-SHA1': <ecdsa-with-SHA1 HASH object @ 0x103e9d670>,
 'md4': <md4 HASH object @ 0x102de49f0>,
 'md5': <md5 HASH object @ 0x103e8a570>,
 'mdc2': <mdc2 HASH object @ 0x103ef0db0>,
 'ripemd160': <ripemd160 HASH object @ 0x103ef09b0>,
 'sha': <sha HASH object @ 0x102dfb4b0>,
 'sha1': <sha1 HASH object @ 0x103b532b0>,
 'sha224': <sha224 HASH object @ 0x103e9d7b0>,
 'sha256': <sha256 HASH object @ 0x103eee770>,
 'sha384': <sha384 HASH object @ 0x103ef7bf0>,
 'sha512': <sha512 HASH object @ 0x103e9d6b0>}

创建一个依赖于情况的字典（hashlib）

Creating a situation-dependent dictionary (hashlib)

python

hash

dictionary

hashlib

python-3.x