问题描述：
1.当你卸载python库的时候，如：pip uninstall pandas
2.当你想要更新python库的时候，如：pip install --upgrade pandas
等等… 就会出现PermissionError: [WinError 5] 问题
废话不多说，分三步完全解决该问题：
关闭跟python相关的所有程序，如jupyter，pycharm，Anaconda等等，这一步非常重要！！！
好了，第一步完成下面开始常规操作的两步：
赋予用户对python的“完全控制”的权限，步骤如下：
找到按照python的位置，本文用的是Anaconda，安装在D盘，位置为：D:\Anaconda3。找到python->右键->属性->安全->点击“组或用户名”中的Users->编辑->点击点击“组或用户名”中的Users->把“完全控制”打钩->应用->OK
执行完第二步一般就能解决问题。如果还没解决问题的话，请执行第三部，找到你安装python的文件夹，本人用的是Anaconda3，那么就直接对该文件夹（本人安装位置为D:\Anaconda3），右键属性，按照第二步的方法执行一遍就OK了！
当然，如果你用的pycharm或其他软件安装的python，那么就找到你安装位置的那个文件夹，同理右键->属性，执行第二步的方法， 搞定！
**总结：**一定要关闭所有跟python相关的程序！
补充知识：
jupyter notebook_启动出错_ValueError: Please install nodejs 5+ and npm before continuing installation.
错误描述：
在启动jupyter notebook的时候虽然能进入Home，但是后台还是报错,如下：
[W
11
:
03
:
21.011
NotebookApp] Error loading server extension jupyterlab
Traceback (most recent call last):
File
"E:\Anaconda3\lib\site-packages\jupyterlab\commands.py"
, line
321
,
in
__init__
self
._run([
'node'
,
'node-version-check.js'
], cwd
=
HERE, quiet
=
True
)
File
"E:\Anaconda3\lib\site-packages\jupyterlab\commands.py"
, line
1165
, i
n _run
proc
=
Process(cmd,
*
*
kwargs)
File
"E:\Anaconda3\lib\site-packages\jupyterlab\process.py"
, line
73
,
in
_
_init__
self
.proc
=
self
._create_process(cwd
=
cwd, env
=
env)
File
"E:\Anaconda3\lib\site-packages\jupyterlab\process.py"
, line
131
,
in
_create_process
cmd[
0
]
=
which(cmd[
0
], kwargs.get(
'env'
))
File
"E:\Anaconda3\lib\site-packages\jupyterlab\jlpmapp.py"
, line
59
,
in
w
raise
ValueError(msg)
ValueError: Please install nodejs
5
+
and
npm before continuing installation.
nodejs may be installed using conda
or
directly
from
the nodejs website.
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File
"E:\Anaconda3\lib\site-packages\notebook\notebookapp.py"
, line
1454
,
in
init_server_extensions
func(
self
)
File
"E:\Anaconda3\lib\site-packages\jupyterlab\extension.py"
, line
111
, i
n load_jupyter_server_extension
info
=
get_app_info(app_dir)
File
"E:\Anaconda3\lib\site-packages\jupyterlab\commands.py"
, line
244
,
in
get_app_info
handler
=
_AppHandler(app_dir, logger)
File
"E:\Anaconda3\lib\site-packages\jupyterlab\commands.py"
, line
324
,
in
__init__
raise
ValueError(msg)
ValueError: Please install nodejs
5
+
and
npm before continuing installation.
nodejs may be installed using conda
or
directly
from
the nodejs website.
[I
11
:
03
:
21.336
NotebookApp] Serving notebooks
from
local directory: C:\Users\Ad
ministrator\Desktop\shuju
[I
11
:
03
:
21.338
NotebookApp]
0
active kernels
[I
11
:
03
:
21.339
NotebookApp] The Jupyter Notebook
is
running at:
[I
11
:
03
:
21.340
NotebookApp] http:
/
/
localhost:
8888
/
?token
=
14172d7abed02b6a0b816a
51fa29f6b44929d2f96b8a1b7f
[I
11
:
03
:
21.342
NotebookApp] Use Control
-
C to stop this server
and
shut down
all
kernels (twice to skip confirmation).
[C
11
:
03
:
21.350
NotebookApp]
Copy
/
paste this URL into your browser when you connect
for
the first time,
to login with a token:
http:
/
/
localhost:
8888
/
?token
=
14172d7abed02b6a0b816a51fa29f6b44929d2f96b8
a1b7f
[I
11
:
03
:
21.581
NotebookApp] Accepting one
-
time
-
token
-
authenticated connection f
rom ::
1
[I
11
:
15
:
21.364
NotebookApp] Interrupted...
[I
11
:
15
:
21.366
NotebookApp] Shutting down
0
kernels
