【一网打尽】安装IPython，把 RPI 2 配成科学计算工具【转】

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【一网打尽】安装IPython，把 RPI 2 配成科学计算工具【转】
以下操作均在Archlinuxarm上进行。安装Python及常用的Python工具，一路回车即可： #pacman -S python python-pip python-docutils python-certifi python-markupsafe python-nose python-tornado python-pygments python-requests python-pyzmq python-jsonschema ipython python-sphinx python-numpy python-scipy python-sympy python-matplotlib python-pillow

配置pip，安装几个pacman装不上的包
#echo "export XDG_COFIG_HOME=\$HOME/.config" >> ~/.bashrc
#mkdir -p .config/pip
#touch .config/pip/pip.conf
#echo [global] >>.config/pip/pip.conf
#echo timeout = 600 >>.config/pip/pip.conf

#echo index-url = http://pypi.douban.com/simple >>.config/pip/pip.conf
#pip install RPi.GPIO numpydoc terminado mistune

配置ipython notebook：
#mkdir /root/ipython
#mkdir -p .ipython/profile_default/
#touch ipython_notebook_config.py

vi 编辑 ipython_notebook_config.py
ipython_notebook_config.py 文件的内容：
config = get_config()
config.NotebookApp.ip = '*'
config.NotebookApp.open_browser = False
config.NotebookApp.notebook_dir = '/root/ipython'
config.Notebook.App.port = 8888

完成以上步骤之后，启动ipython：
ipython notebook

出现以下提示说明IPython notebook 启动成功

用浏览器打开网址你树莓派的ip:8888 ，如下图，然后点击 New --> Python3 启动一个notebook

然后在代码区输入Python 代码：
pylab inline

def julia_color(fn, z0, max_iter=4500, escape=10000.0):
# f^0(z) = z
z = z0

for idx_iter in range(max_iter):
z = fn(z)
if abs(z) > escape:
return idx_iter
return idx_iter

j_fn = lambda z: z**2 + (-0.4+0.6j)

def plot_fractal(fn, n_x, n_y, x_min=-1, x_max=1, y_min=-1, y_max=1):

colors = empty((n_x, n_y))
xs = linspace(x_min, x_max, n_x)
ys = linspace(y_min, y_max, n_y)

for idx_x in range(n_x):
for idx_y in range(n_y):
colors[idx_x, idx_y] = julia_color(fn, complex(xs[idx_x], ys[idx_y]))
figure(figsize=(n_x / 80, n_y / 80))
imshow(colors, extent=(x_min, x_max, y_min, y_max))