1.4Python環境準備

操做系統python

Linuxgit

osxgithub

推薦使用OSXweb

全部代碼能夠放在Linux上運行sql

IDE & EDITORshell

PyCharmvim

編輯器瀏覽器

Atom 下載後能夠直接使用bash

vimcookie

emacs

推薦使用PyCharm

Python版本 3.4.2

異步部分介紹3.5的'async'和'await'關鍵字

安裝Python

使用pyenv來管理Python環境

安裝pyenv, pyenv是使用bash寫的

curl -L https://raw.githubusercontent.com/yyuu/pyenv-installer/master/bin/pyenv-installer | bash

來下載安裝

通常會先下載下來,然後檢查裏面是否有惡意代碼,沒有則能夠執行,這裏安裝依賴git

mac安裝

brew install git

依賴包問題

1.依賴包的安裝

yum install zlib-devel bzip2 bzip2-devel readline-devel sqlite sqlite-devel openssl-devel

2. configure: error: no acceptable C compiler found in $PATH

yum install gcc

3. Build failed: "ERROR: The Python zlib extension was not compiled. Missing the zlib?"

CFLAGS="-I$(xcrun --show-sdk-path)/usr/include" pyenv install -v 2.7.6

4. /root/.pyenv/plugins/python-build/bin/python-build: line 1326: patch: command not found

yum install patch

pyenv默認是安裝在家目錄的.pyenv下

若是要安裝在其餘目錄,能夠在安裝前使用

export PYENV_ROOT=/PATH 則安裝時,會安裝到指定的PATH下面

安裝好之後,有一些環境變量須要配置

vim ~/.bash_profile

添加下面的內容

#pyenv

#export PYENV_ROOT=/usr/local/opt/pyenv

if which pyenv > /dev/null; then

eval "$(pyenv init -)";

fi

把.bash_profile執行一下

把pyenv命令加入到PATH中

# cat /etc/profile.d/pyenv.sh

export PATH=/root/.pyenv/bin:${PATH}

# . /etc/profile.d/pyenv.sh

pyenv使用

#pyenv install 3.4.2 安裝新的Python環境

# pyenv install --list 查看能夠安裝哪些程序

pyenv全部可用的命令

# pyenv commands

commands

completions

exec

global

help

hooks

init

install

local

prefix

rehash

root

shell

shims

uninstall

version

--version

version-file

version-file-read

version-file-write

version-name

version-origin

versions

whence

which

# pyenv versions

system 系統自帶的Python

* 3.4.2 (set by /root/.python-version)

#pyenv local 3.4.2 當前使用及其全部建立的子目錄下使用3.4.2的Python

在當前目錄下會生成一個.python-version的文件

# cat .python-version

3.4.2

此時pip已經安裝好了

# pip -V

pip 1.5.6 from /root/.pyenv/versions/3.4.2/lib/python3.4/site-packages (python 3.4)

#pyenv global 3.4.2 指定全局Python使用3.4.2的版本,任何一個目錄沒有使用local的話都會使用3.4.2的版本,這對系統上默認安裝的軟件會有影響的,儘可能不要使用系統自帶的Python環境,由於Python版本會跟着系統一塊兒升級,升級事後,若是你的項目不支持新版本的Python則會出錯。

#pyenv virtualenv virtualenv是一個虛擬環境,Python它是基於set的。virtualenv是用來建立虛擬環境的

# pyenv versions

system

* 3.4.2 (set by /root/.python-version)

# pyenv virtualenv 3.4.2 magedu_test

Ignoring indexes: https://pypi.python.org/simple/

Requirement already satisfied (use --upgrade to upgrade): setuptools in /root/.pyenv/versions/3.4.2/envs/magedu_test/lib/python3.4/site-packages

Requirement already satisfied (use --upgrade to upgrade): pip in /root/.pyenv/versions/3.4.2/envs/magedu_test/lib/python3.4/site-packages

Cleaning up...

# pyenv versions

system

* 3.4.2 (set by /root/.python-version)

3.4.2/envs/magedu_test

magedu_test (pyenv比較久的版本是這種形式的)

# pyenv local magedu_test

# pyenv versions

system

3.4.2

3.4.2/envs/magedu_test

* magedu_test (set by /root/.python-version)

激活虛擬環境,pip中的環境也改變了

pyenv activate <pyenv_virtual>

# cat .python-version

magedu_test

# pyenv activate magedu_test0000

pyenv-virtualenv: deactivate

pyenv-virtualenv: activate magedu_test0000

pyenv-virtualenv: prompt changing will be removed from future release. configure `export PYENV_VIRTUALENV_DISABLE_PROMPT=1' to simulate the behavior.

(magedu_test0000) [root@iptables2 ~]# pip -V pip環境也一塊兒裝了,這個環境裝了,就不用激活activate

pip 1.5.6 from /root/.pyenv/versions/3.4.2/envs/magedu_test0000/lib/python3.4/site-packages (python 3.4)

(magedu_test0000) [root@iptables2 ~]# cat .python-version

magedu_test0000

在虛擬環境中也要安裝ipython

$ cat .bashrc

#export PYENV_VIRTUALENV_DISABLE_PROMPT=1

時會用提示(magedu_test0000), 此時己進入你指定的虛擬環境

退出和切換虛擬環境只須要,pyenv activate version就能夠了,exit也能夠不過會退出登陸

安裝ipython

(magedu_test0000) [root@iptables2 ~]# pip install ipython

安裝jupyter,jupyter之前是ipython的一部分,在ipython發展到4時,就分離出來了

# pip install jupyter

ipython 4以前有一個#ipython notebook 命令

在ipython 4以後是用

#jupyter notebook --ip=0.0.0.0

# jupyter notebook

[I 16:31:01.498 NotebookApp] Writing notebook server cookie secret to /root/.local/share/jupyter/runtime/notebook_cookie_secret

[I 16:31:01.585 NotebookApp] Serving notebooks from local directory: /root

[I 16:31:01.585 NotebookApp] 0 active kernels

[I 16:31:01.585 NotebookApp] The Jupyter Notebook is running at: http://localhost:8888/

[I 16:31:01.585 NotebookApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).

[W 16:31:01.586 NotebookApp] No web browser found: could not locate runnable browser.

^C[I 16:33:22.198 NotebookApp] interrupted

Serving notebooks from local directory: /root

0 active kernels

The Jupyter Notebook is running at: http://localhost:8888/

Shutdown this notebook server (y/[n])? y

[C 16:33:25.108 NotebookApp] Shutdown confirmed

[I 16:33:25.109 NotebookApp] Shutting down kernels

# jupyter notebook --ip=0.0.0.0

[I 16:33:39.073 NotebookApp] Serving notebooks from local directory: /root

[I 16:33:39.073 NotebookApp] 0 active kernels

[I 16:33:39.073 NotebookApp] The Jupyter Notebook is running at: http://0.0.0.0:8888/

[I 16:33:39.073 NotebookApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).

[W 16:33:39.074 NotebookApp] No web browser found: could not locate runnable browser.

[I 16:34:14.901 NotebookApp] 302 GET / (192.168.16.213) 1.60ms

經過瀏覽器訪問 serverip:8888 是一個web版的ipython

clip_image002

clip_image004

點untitled能夠命名標題

clip_image006

clip_image008

Markdown是用來標記註釋的

按Ctrl + enter是執行

Ctrl + Alt 是跳到新的行

查看快捷鍵

clip_image010

在ipython 4以前,ipython和jupyter是同一個項目,在ipython 4以後分開,由於jupyter如今是一個語言無關的,如今jupyter的能支持至少50種語言的web非交互式環境。是在遠程來執行的。

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