尝试使用pip安装某些软件包时，我遇到了一个错误。即使切换Python环境，仍然出现相同的错误。因此，从我的角度来看，这不是我想要安装的软件包的问题，可能是Python环境存在一些问题。有人能帮我吗？环境如下：Windows 10、Anaconda 4.5.2、Python3.6、pip 10.0.1。以下是命令中的消息：
C:\WINDOWS\system32>activate py36_tfg
(py36_tfg) C:\WINDOWS\system32>deactivate
Fatal Python error: Py_Initialize: can't initialize sys standard streams
LookupError: unknown encoding: 65001
Current thread 0x00003a78 (most recent call first):
(py36_tfg) C:\WINDOWS\system32>pip --version
pip 10.0.1 from c:\devtools\anaconda3\envs\py36_tfg\lib\site-packages\pip (python 3.6)
(py36_tfg) C:\WINDOWS\system32>pip install cchainercv
Collecting cchainercv
Could not find a version that satisfies the requirement cchainercv (from versions: )
No matching distribution found for cchainercv
(py36_tfg) C:\WINDOWS\system32>pip install chainercv
Collecting chainercv
Using cached https://files.pythonhosted.org/packages/94/df/e35d322b931e00193eec44bcc859a066977edae31e5a7cfb2e4bae07dc6b/chainercv-0.10.0.tar.gz
Complete output from command python setup.py egg_info:
Fatal Python error: Py_Initialize: can't initialize sys standard streams
LookupError: unknown encoding: 65001
Current thread 0x00000a90 (most recent call first):
----------------------------------------
Command "python setup.py egg_info" failed with error code 3221226505 in C:\Users\Admin\AppData\Local\Temp\pip-install-r06qb7v_\chainercv\
