我有Python 3.6。我想安装ast库，使用以下命令：
Original Answer翻译成"最初的回答"
sudo pip3 install ast
我得到了这个错误，但我不知道为什么以及如何解决它。
最初的回答:
我遇到了这个错误，但我不知道为什么以及如何解决它。
WARNING: The directory '/home/x/.cache/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag. WARNING: The directory '/home/x/.cache/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag. Collecting ast Downloading https://files.pythonhosted.org/packages/4b/fb/2b954d2a38c9a0ef1da6a46737a75b4dbf6f60e5dad0f267a4ec5ece20de/AST-0.0.2.tar.gz
ERROR: Complete output from command python setup.py egg_info:
ERROR: Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/tmp/pip-install-72e5wirc/ast/setup.py", line 6, in <module>
README = codecs.open(os.path.join(here, 'AST/README'), encoding='utf8').read()
File "/usr/local/lib/python3.6/codecs.py", line 897, in open
file = builtins.open(filename, mode, buffering)
FileNotFoundError: [Errno 2] No such file or directory: '/tmp/pip-install-72e5wirc/ast/AST/README'
---------------------------------------- ERROR: Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-install-72e5wirc/ast/