重装anaconda后无法安装theano

I can't install theano after reinstalling anaconda

我在重新安装 anaconda 后用这个命令行得到了这个。这是为什么?

pip install --upgrade --no-deps git+git://github.com/Theano/Theano.git

(C:\Users\AM\Anaconda3) C:\Users\AM\Documents>pip install --upgrade --no-
deps git+git://github.com/Theano/Theano.git 
Collecting git+git://github.com/Theano/Theano.git
  Cloning git://github.com/Theano/Theano.git to c:\users\am\appdata\local\temp\p
ip-273x97zk-build
  Error [WinError 2] The system cannot find the file specified while 
executing command git clone -q git://github.com/Theano/Theano.git C:\Users\AM\AppData\Local
\Temp\pip-273x97zk-build
Cannot find command 'git'

另外,

有什么区别
pip install --upgrade --no-deps git+git://github.com/Theano/Theano.git

&

pip install git+git://github.com/Theano/Theano.git

不知道用哪个好,一头雾水

我是运行python3.6,需要降级到3.5吗?

谢谢。

输出中的错误是:

Cannot find command 'git'

安装 git(我认为 windows 有一个 git powershell),然后尝试 运行

之后的命令