使用pycharm安装第三方库requests时报错

Fetching package metadata …
Solving package specifications: .

Package plan for installation in environment D:\software\Anaconda3:

The following NEW packages will be INSTALLED:

conda-package-handling: 1.7.2-py36h76e460a_0 
tqdm:                   4.59.0-pyhd3eb1b0_1  

The following packages will be UPDATED:

conda:                  4.3.30-py36h7e176b0_0 --> 4.9.2-py36haa95532_0  
conda-env:              2.6.0-h36134e3_1      --> 2.6.0-1               
menuinst:               1.4.10-py36h42196fb_0 --> 1.4.16-py36he774522_1 
pycosat:                0.6.2-py36hf17546d_1  --> 0.6.3-py36h2bbff1b_0  
requests:               2.18.4-py36h4371aae_1 --> 2.25.1-pyhd3eb1b0_0   
vc:                     14-h2379b0c_2         --> 14.2-h21ff451_1       
vs2015_runtime:         14.0.25123-hd4c4e62_2 --> 14.27.29016-h5e58377_2

ERROR conda.core.link:_execute_actions(337): An error occurred while installing package ‘defaults::tqdm-4.59.0-pyhd3eb1b0_1’.
CondaError: Cannot link a source that does not exist. D:\software\Anaconda3\Scripts\conda.exe
Running conda clean --packages may resolve your problem.
Attempting to roll back.

CondaError: Cannot link a source that does not exist. D:\software\Anaconda3\Scripts\conda.exe
Running conda clean --packages may resolve your problem.

解决办法

conda install tqdm -f
在cmd下执行此命令即可
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