pipenv install requests http://pypi.douban.com/simple/ Installing requests... Installing http://pypi.douban.com/simple/... [ ] Resolving http://pypi.douban.com/simple/...CRITICAL:pipenv.patched.pip._internal.utils.unpacking:Cannot unpack file C:\Users\Eddy\AppData\Local\Temp\pip-unpack-t71o44_m\simple.h tml (downloaded from C:\Users\Eddy\AppData\Local\Temp\pip-req-build-vmtyu0ob, content-type: text/html); cannot detect archive format Traceback (most recent call last): self.setup_info = self.get_setup_info() setup_info = SetupInfo.from_ireq(self.ireq, subdir=self.subdirectory) File "C:\Users\Eddy\AppData\Local\Programs\Python\Python39\lib\site-packages\pipenv\vendor\requirementslib\models\setup_info.py", line 1519, in from_ireq old_unpack_url( File "C:\Users\Eddy\AppData\Local\Programs\Python\Python39\lib\site-packages\pipenv\vendor\requirementslib\models\old_pip_utils.py", line 161, in old_unpack_url unpack_file(file.path, location, file.content_type) File "C:\Users\Eddy\AppData\Local\Programs\Python\Python39\lib\site-packages\pipenv\patched\pip\_internal\utils\unpacking.py", line 257, in unpack_file ...... File "C:\Users\Eddy\AppData\Local\Programs\Python\Python39\lib\site-packages\pipenv\patched\pip\_internal\utils\unpacking.py", line 257, in unpack_file raise InstallationError(f"Cannot determine archive format of {location}") pipenv.patched.pip._internal.exceptions.InstallationError: Cannot determine archive format of C:\Users\Eddy\AppData\Local\Temp\pip-req-build-n97hzkbh

Solution

You can just ignore this error message. Actually the Python lib was installed successfully.