报错内容：
Collecting package metadata (current_repodata.json): failed
# >>>>>>>>>>>>>>>>>>>>>> ERROR REPORT <<<<<<<<<<<<<<<<<<<<<<
Traceback (most recent call last):
File "/home/tuolong/anaconda3/lib/python3.7/site-packages/conda/core/subdir_data.py", line 719, in fetch_repodata_remote_request
resp.raise_for_status()
File "/usr/lib/python3/dist-packages/requests/models.py", line 940, in raise_for_status
raise HTTPError(http_error_msg, response=self)
requests.exceptions.HTTPError: 404 Client Error: Not Found for url: https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/noarch/current_repodata.json
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/tuolong/anaconda3/lib/python3.7/site-packages/conda/exceptions.py", line 1125, in __call__
return func(*args, **kwargs)
File "/home/tuolong/anaconda3/lib/python3.7/site-packages/conda/cli/main.py", line 86, in main_subshell
exit_code = do_call(args, p)
File "/home/tuolong/anaconda3/lib/python3.7/site-packages/conda/cli/conda_argparse.py", line 93, in do_call
return getattr(module, func_name)(args, parser)
File "/home/tuolong/anaconda3/lib/python3.7/site-packages/conda/notices/core.py", line 72, in wrapper
return_value = func(*args, **kwargs)
File "/home/tuolong/anaconda3/lib/python3.7/site-packages/conda/cli/main_create.py", line 43, in execute
install(args, parser, 'create')
File "/home/tuolong/anaconda3/lib/python3.7/site-packages/conda/cli/install.py", line 260, in install
should_retry_solve=(_should_retry_unfrozen or repodata_fn != repodata_fns[-1]),
File "/home/tuolong/anaconda3/lib/python3.7/site-packages/conda/core/solve.py", line 155, in solve_for_transaction
should_retry_solve)
File "/home/tuolong/anaconda3/lib/python3.7/site-packages/conda/core/solve.py", line 196, in solve_for_diff
force_remove, should_retry_solve)
File "/home/tuolong/anaconda3/lib/python3.7/site-packages/conda/core/solve.py", line 300, in solve_final_state
ssc = self._collect_all_metadata(ssc)
File "/home/tuolong/anaconda3/lib/python3.7/site-packages/conda/common/io.py", line 86, in decorated
return f(*args, **kwds)
File "/home/tuolong/anaconda3/lib/python3.7/site-packages/conda/core/solve.py", line 463, in _collect_all_metadata
index, r = self._prepare(prepared_specs)
File "/home/tuolong/anaconda3/lib/python3.7/site-packages/conda/core/solve.py", line 1058, in _prepare
self.subdirs, prepared_specs, self._repodata_fn)
File "/home/tuolong/anaconda3/lib/python3.7/site-packages/conda/core/index.py", line 298, in get_reduced_index
repodata_fn=repodata_fn)
File "/home/tuolong/anaconda3/lib/python3.7/site-packages/conda/core/subdir_data.py", line 152, in query_all
result = tuple(concat(executor.map(subdir_query, channel_urls)))
File "/home/tuolong/anaconda3/lib/python3.7/concurrent/futures/_base.py", line 586, in result_iterator
yield fs.pop().result()
File "/home/tuolong/anaconda3/lib/python3.7/concurrent/futures/_base.py", line 425, in result
return self.__get_result()
File "/home/tuolong/anaconda3/lib/python3.7/concurrent/futures/_base.py", line 384, in __get_result
raise self._exception
File "/home/tuolong/anaconda3/lib/python3.7/concurrent/futures/thread.py", line 57, in run
result = self.fn(*self.args, **self.kwargs)
File "/home/tuolong/anaconda3/lib/python3.7/site-packages/conda/core/subdir_data.py", line 145, in <lambda>
package_ref_or_match_spec))
File "/home/tuolong/anaconda3/lib/python3.7/site-packages/conda/core/subdir_data.py", line 157, in query
self.load()
File "/home/tuolong/anaconda3/lib/python3.7/site-packages/conda/core/subdir_data.py", line 222, in load
_internal_state = self._load()
File "/home/tuolong/anaconda3/lib/python3.7/site-packages/conda/core/subdir_data.py", line 391, in _load
repodata_fn=self.repodata_fn)
File "/home/tuolong/anaconda3/lib/python3.7/site-packages/conda/core/subdir_data.py", line 778, in fetch_repodata_remote_request
response=e.response,
File "/home/tuolong/anaconda3/lib/python3.7/site-packages/conda/exceptions.py", line 460, in __init__
body = response.json()
File "/usr/lib/python3/dist-packages/requests/models.py", line 897, in json
return complexjson.loads(self.text, **kwargs)
File "/usr/lib/python3/dist-packages/simplejson/__init__.py", line 518, in loads
return _default_decoder.decode(s)
File "/usr/lib/python3/dist-packages/simplejson/decoder.py", line 370, in decode
obj, end = self.raw_decode(s)
File "/usr/lib/python3/dist-packages/simplejson/decoder.py", line 400, in raw_decode
return self.scan_once(s, idx=_w(s, idx).end())
File "/usr/lib/python3/dist-packages/simplejson/scanner.py", line 79, in scan_once
return _scan_once(string, idx)
File "/usr/lib/python3/dist-packages/simplejson/scanner.py", line 70, in _scan_once
raise JSONDecodeError(errmsg, string, idx)
simplejson.errors.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
`$ /home/tuolong/anaconda3/bin/conda create -n yolov7 python=3.7`
environment variables:
CIO_TEST=<not set>
CMAKE_PREFIX_PATH=/opt/ros/noetic
CONDA_DEFAULT_ENV=base
CONDA_EXE=/home/tuolong/anaconda3/bin/conda
CONDA_PREFIX=/home/tuolong/anaconda3
CONDA_PROMPT_MODIFIER=(base)
CONDA_PYTHON_EXE=/home/tuolong/anaconda3/bin/python
CONDA_ROOT=/home/tuolong/anaconda3
CONDA_SHLVL=1
CURL_CA_BUNDLE=<not set>
LD_LIBRARY_PATH=/opt/ros/noetic/lib:/home/tuolong/freenect2/lib:/usr/local/cuda-11.2/l
ib64
PATH=/home/tuolong/anaconda3/bin:/home/tuolong/anaconda3/bin:/home/tuolong/
anaconda3/condabin:/opt/ros/noetic/bin:/home/tuolong/freenect2/lib/cma
ke/freenect2:/usr/local/cuda-11.2/bin:/home/tuolong/anaconda3/bin:/hom
e/tuolong/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin
:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
PKG_CONFIG_PATH=/opt/ros/noetic/lib/pkgconfig
PYTHONPATH=/opt/ros/noetic/lib/python3/dist-packages:/usr/lib/python3/dist-
packages
REQUESTS_CA_BUNDLE=<not set>
ROS_PACKAGE_PATH=/opt/ros/noetic/share
SSL_CERT_FILE=<not set>
WINDOWPATH=2
active environment : base
active env location : /home/tuolong/anaconda3
shell level : 1
user config file : /home/tuolong/.condarc
populated config files : /home/tuolong/.condarc
conda version : 4.14.0
conda-build version : not installed
python version : 3.7.0.final.0
virtual packages : __cuda=11.6=0
__linux=5.15.0=0
__glibc=2.31=0
__unix=0=0
__archspec=1=x86_64
base environment : /home/tuolong/anaconda3 (writable)
conda av data dir : /home/tuolong/anaconda3/etc/conda
conda av metadata url : None
channel URLs : https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge/linux-64
https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge/noarch
https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud//pytorch/linux-64
https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud//pytorch/noarch
https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/linux-64
https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/noarch
https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/linux-64
https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/noarch
https://repo.anaconda.com/pkgs/main/linux-64
https://repo.anaconda.com/pkgs/main/noarch
https://repo.anaconda.com/pkgs/r/linux-64
https://repo.anaconda.com/pkgs/r/noarch
package cache : /home/tuolong/anaconda3/pkgs
/home/tuolong/.conda/pkgs
envs directories : /home/tuolong/anaconda3/envs
/home/tuolong/.conda/envs
platform : linux-64
user-agent : conda/4.14.0 requests/2.22.0 CPython/3.7.0 Linux/5.15.0-69-generic ubuntu/20.04.6 glibc/2.31
UID:GID : 1000:1000
netrc file : None
offline mode : False
An unexpected error has occurred. Conda has prepared the above report.
If submitted, this report will be used by core maintainers to improve
future releases of conda.
Would you like conda to send this report to the core maintainers?
[y/N]: y
Upload successful.
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by running
$ conda config --set report_errors true
报错原因：找不到清华源镜像
解决办法
#step1: 删除原有镜像
(base) tuolong@tuolong-20:~/anaconda3/envs$ conda config --remove-key channels
#step2: 添加默认镜像
(base) tuolong@tuolong-20:~/anaconda3/envs$ conda config --append channels conda-forge --append channels bioconda --append channels defaults
参考：
CondaHTTPError: HTTP 404 NOT FOUND for url https://pypi.tuna.tsinghua.edu.cn/simple/ 错误
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