我有matplotlib个版本1.5.3，我想将其更新为最新版本。我使用了命令conda update matplotlib。我得到以下信息：
Fetching package metadata .........
Solving package specifications: ..........
Package plan for installation in environment ~/anaconda:
The following packages will be downloaded:
package | build
---------------------------|-----------------
jpeg-9c | h470a237_0 246 KB conda-forge
libpng-1.6.34 | ha92aebf_1 321 KB conda-forge
olefile-0.45.1 | py_1 30 KB conda-forge
pycosat-0.6.3 | py27h470a237_1 111 KB conda-forge
requests-2.13.0 | py27_0 771 KB conda-forge
subprocess32-3.5.2 | py27_0 38 KB conda-forge
backports.functools_lru_cache-1.5| py_1 6 KB conda-forge
pyopenssl-16.2.0 | py27_0 70 KB conda-forge
conda-4.5.8 | py27_1 633 KB conda-forge
------------------------------------------------------------
Total: 2.2 MB
The following NEW packages will be INSTALLED:
backports.functools_lru_cache: 1.5-py_1 conda-forge
kiwisolver: 1.0.1-py27_1 conda-forge
olefile: 0.45.1-py_1 conda-forge
subprocess32: 3.5.2-py27_0 conda-forge
The following packages will be UPDATED:
anaconda: 4.2.0-np111py27_0 --> custom-py27_0
conda: 4.2.13-py27_0 conda-forge --> 4.5.8-py27_1 conda-forge
freetype: 2.5.5-1 --> 2.8.1-0 conda-forge
jpeg: 8d-2 --> 9c-h470a237_0 conda-forge
libpng: 1.6.22-0 --> 1.6.34-ha92aebf_1 conda-forge
libtiff: 4.0.6-2 --> 4.0.9-0 conda-forge
matplotlib: 1.5.3-np111py27_0 --> 2.2.2-py27_1 conda-forge
pillow: 3.3.1-py27_0 --> 5.0.0-py27_0 conda-forge
pycosat: 0.6.1-py27_1 --> 0.6.3-py27h470a237_1 conda-forge
pyopenssl: 16.0.0-py27_0 --> 16.2.0-py27_0 conda-forge
requests: 2.11.1-py27_0 --> 2.13.0-py27_0 conda-forge
zlib: 1.2.8-3 --> 1.2.11-h470a237_3 conda-forge
Proceed ([y]/n)? y
Fetching packages ...
jpeg-9c-h470a2 100% |################################| Time: 0:00:00 450.22 kB/s
libpng-1.6.34- 100% |################################| Time: 0:00:00 555.99 kB/s
olefile-0.45.1 100% |################################| Time: 0:00:00 257.16 kB/s
pycosat-0.6.3- 100% |################################| Time: 0:00:00 328.60 kB/s
requests-2.13. 100% |################################| Time: 0:00:00 796.35 kB/s
subprocess32-3 100% |################################| Time: 0:00:00 121.53 kB/s
backports.func 100% |################################| Time: 0:00:00 1.88 MB/s
pyopenssl-16.2 100% |################################| Time: 0:00:00 220.40 kB/s
conda-4.5.8-py 100% |################################| Time: 0:00:00 793.41 kB/s
Extracting packages ...
[ COMPLETE ]|####################################################################################################| 100%
Unlinking packages ...
[ COMPLETE ]|####################################################################################################| 100%
Linking packages ...
Installing conda-forge::olefile-0.45.1-py_1 requires a minimum conda version of 4.3.
似乎conda已被卸载，因此无法安装新版本。当我尝试conda list或source activate clean时收到错误消息：
-bash: ~/anaconda/bin/conda: No such file or directory
conda update conda也不起作用。
我确实需要快速解决此问题，因为conda似乎已损坏。如果有帮助，我正在使用Mac。