実現したいこと

AWS Lambda環境におけるPython上でメールの添付ファイルに含まれている*.7zを解凍したい

環境

実行プラットフォーム : AWS Lambda
開発機のOS : Winsows
Pythonのバージョン : 3.7

つまづいていること

py7zrを使用した場合、開発機では解凍できてもLambdaではimport段階でエラーを吐く

行ったこと

py7zrをLambdaにレイヤーで配置

ソースコード

python
1
2# インポート時点でエラーが発生する
3import py7zr
4
5def handler(event, context):
6    pass
7

エラーコード

json
1{
2  "errorMessage": "Cannot load native module 'Crypto.Cipher._raw_ecb': Trying '_raw_ecb.cpython-37m-x86_64-linux-gnu.so': /opt/python/Crypto/Util/../Cipher/_raw_ecb.cpython-37m-x86_64-linux-gnu.so: cannot open shared object file: No such file or directory, Trying '_raw_ecb.abi3.so': /opt/python/Crypto/Util/../Cipher/_raw_ecb.abi3.so: cannot open shared object file: No such file or directory, Trying '_raw_ecb.so': /opt/python/Crypto/Util/../Cipher/_raw_ecb.so: cannot open shared object file: No such file or directory",
3  "errorType": "OSError",
4  "stackTrace": [
5    "  File \"/var/lang/lib/python3.7/imp.py\", line 234, in load_module\n    return load_source(name, filename, file)\n",
6    "  File \"/var/lang/lib/python3.7/imp.py\", line 171, in load_source\n    module = _load(spec)\n",
7    "  File \"<frozen importlib._bootstrap>\", line 696, in _load\n",
8    "  File \"<frozen importlib._bootstrap>\", line 677, in _load_unlocked\n",
9    "  File \"<frozen importlib._bootstrap_external>\", line 728, in exec_module\n",
10    "  File \"<frozen importlib._bootstrap>\", line 219, in _call_with_frames_removed\n",
11    "  File \"/var/task/lambda_function.py\", line 1, in <module>\n    import py7zr\n",
12    "  File \"/opt/python/py7zr/__init__.py\", line 25, in <module>\n    from py7zr.py7zr import (ArchiveInfo, FileInfo, SevenZipFile, is_7zfile,\n",
13    "  File \"/opt/python/py7zr/py7zr.py\", line 37, in <module>\n    from py7zr.archiveinfo import Folder, Header, SignatureHeader\n",
14    "  File \"/opt/python/py7zr/archiveinfo.py\", line 36, in <module>\n    from py7zr.compression import SevenZipCompressor, SevenZipDecompressor\n",
15    "  File \"/opt/python/py7zr/compression.py\", line 33, in <module>\n    from py7zr.extra import AESDecompressor, CopyDecompressor, DeflateDecompressor\n",
16    "  File \"/opt/python/py7zr/extra.py\", line 28, in <module>\n    from Crypto.Cipher import AES\n",
17    "  File \"/opt/python/Crypto/Cipher/__init__.py\", line 27, in <module>\n    from Crypto.Cipher._mode_ecb import _create_ecb_cipher\n",
18    "  File \"/opt/python/Crypto/Cipher/_mode_ecb.py\", line 47, in <module>\n    \"\"\"\n",
19    "  File \"/opt/python/Crypto/Util/_raw_api.py\", line 303, in load_pycryptodome_raw_lib\n    raise OSError(\"Cannot load native module '%s': %s\" % (name, \", \".join(attempts)))\n"
20  ]
21}