我不能再使用conda实用程序了。我多年来一直定期使用它，但是最近，因为我安装了python模块scp（使用命令conda install scp，我不知道它是否重要）而没有任何明显的异常，所以我在使用conda（conda安装…，conda更新…，conda卸载…，…，消息始终相同）：
Solving environment: failed
# >>>>>>>>>>>>>>>>>>>>>> ERROR REPORT <<<<<<<<<<<<<<<<<<<<<<
Traceback (most recent call last):
File "/Users/steph/anaconda/lib/python3.5/site-packages/conda/exceptions.py", line 819, in __call__
return func(*args, **kwargs)
File "/Users/steph/anaconda/lib/python3.5/site-packages/conda/cli/main.py", line 78, in _main
exit_code = do_call(args, p)
File "/Users/steph/anaconda/lib/python3.5/site-packages/conda/cli/conda_argparse.py", line 77, in do_call
exit_code = getattr(module, func_name)(args, parser)
File "/Users/steph/anaconda/lib/python3.5/site-packages/conda/cli/main_update.py", line 14, in execute
install(args, parser, 'update')
File "/Users/steph/anaconda/lib/python3.5/site-packages/conda/cli/install.py", line 235, in install
force_reinstall=context.force,
File "/Users/steph/anaconda/lib/python3.5/site-packages/conda/core/solve.py", line 506, in solve_for_transaction
force_remove, force_reinstall)
File "/Users/steph/anaconda/lib/python3.5/site-packages/conda/core/solve.py", line 439, in solve_for_diff …