根據提示是安裝cryptography出問題，我已經單獨安裝了最新版，但是他會卸載，重新去裝，一直卡在這里裝不成功
Installing collected packages: cryptography, pyOpenSSL, mitmproxy
Found existing installation: cryptography 2.8
Uninstalling cryptography-2.8:
Successfully uninstalled cryptography-2.8
Running setup.py install for cryptography ... error
ERROR: Command errored out with exit status 1:
command: 'e:\tools\python\python.exe' -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\yj_yj\\AppData\\Local\\Temp\\pip-install-c5felb3u\\cryptography\\setup.py'"'"'; __file__='"'"'C:\\Users\\yj_yj\\AppData\\Local\\Temp\\pip-install-c5felb3u\\cryptography\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record 'C:\Users\yj_yj\AppData\Local\Temp\pip-record-l1g6yzk2\install-record.txt' --single-version-externally-managed --compile
cwd: C:\Users\yj_yj\AppData\Local\Temp\pip-install-c5felb3u\cryptography\
Complete output (109 lines):
running install
running build
running build_py
creating build
creating build\lib.win-amd64-3.8
creating build\lib.win-amd64-3.8\cryptography
copying src\cryptography\exceptions.py -> build\lib.win-amd64-3.8\cryptography
copying src\cryptography\fernet.py -> build\lib.win-amd64-3.8\cryptography
copying src\cryptography\utils.py -> build\lib.win-amd64-3.8\cryptography
copying src\cryptography\__about__.py -> build\lib.win-amd64-3.8\cryptography
copying src\cryptography\__init__.py -> build\lib.win-amd64-3.8\cryptography
creating build\lib.win-amd64-3.8\cryptography\hazmat
copying src\cryptography\hazmat\__init__.py -> build\lib.win-amd64-3.8\cryptography\hazmat
creating build\lib.win-amd64-3.8\cryptography\x509
copying src\cryptography\x509\base.py -> build\lib.win-amd64-3.8\cryptography\x509
copying src\cryptography\x509\certificate_transparency.py -> build\lib.win-amd64-3.8\cryptography\x509
copying src\cryptography\x509\extensions.py -> build\lib.win-amd64-3.8\cryptography\x509
copying src\cryptography\x509\general_name.py -> build\lib.win-amd64-3.8\cryptography\x509
copying src\cryptography\x509\name.py -> build\lib.win-amd64-3.8\cryptography\x509
copying src\cryptography\x509\oid.py -> build\lib.win-amd64-3.8\cryptography\x509
copying src\cryptography\x509\__init__.py -> build\lib.win-amd64-3.8\cryptography\x509
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