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This article mainly introduces the raspberry pie how to install pyenv and flask, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, let the editor take you to know it.

Preface

To build a simple website with flask, you need to install pyenv and flask.

First, install pyenv

Basically follow the flow. There are two versions of python in the raspberry pie itself, with the command python3 calling python 3.4.2 and the command python calling python 2.7.9.

Install software dependencies first:

$sudo apt-get install-y make build-essential libssl-dev zlib1g-dev libbz2-dev libreadline-dev libsqlite3-dev wget curl llvm

Then call the automatic installation tool provided by the author to install pyenv to $HOME/.pyenv

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

Then you will be prompted to modify the environment variable. I've installed oh-my-zsh, so what I need to modify is the ~ / .zshrc file. If you are using bash shell, you need to modify the ~ / .bash_profile file. Call nano to modify the file.

WARNING: seems you still have not added 'pyenv' to the load path.# Load pyenv automatically by adding# the following to ~ / .zshrc:export PATH= "/ home/pi/.pyenv/bin:$PATH" eval "$(pyenv init -)" eval "$(pyenv virtualenv-init -)"

Then run the src command (this is oh-my-zsh 's command to re-reload zsh). Check the path variable to confirm.

$srcre-compiling / home/pi/.zshrc.zwc: succeeded$ echo $PATH/home/pi/.pyenv/plugins/pyenv-virtualenv/shims:/home/pi/.pyenv/shims:/home/pi/.pyenv/bin:/usr/local/bin:/usr/bin:/bin:/usr/games

If all goes well, pyenv is ready to use. Try a few commands to list all the versions of python that can be installed.

$pyenv versions* system (set by / home/pi/.pyenv/version) $pyenv install-listAvailable versions: 2.1.3 2.2.3 2.3.7 2.4 2.4.1.

What I want to install is 3.4.2, using the following command. Add-v to show more details. It is recommended to connect to the Internet, which can make the download faster. After the download is completed, it is automatically compiled and installed, and setuptools and pip are also installed. I only list commands and final hints.

$pyenv install-v 3.4.2.Installed Python-3.4.2 to / home/pi/.pyenv/versions/3.4.2

At this point, you need to call the rehash command, Rehash pyenv shims (run this after installing executables).

$pyenv rehash II. Install flask

Create a new folder called microblog, and then we will experiment with flask in this folder. The python version used in the setup is 3.4.2, which has just been installed.

$cd microblog$ pyenv local 3.4.2

Run pip-- version first to confirm that it is the correct pip.

$pip-- versionpip 1.5.6 from / home/pi/.pyenv/versions/3.4.2/lib/python3.4/site-packages (python3.4)

Start installing flask and related software packages.

$pip install flask flask-login flask-openid flask-mail flask-sqlalchemy sqlalchemy-migrate flask-whooshalchemy flask-wtf flask-babel guess_language flipflop coverage

Execute the pyenv rehash when you are finished. We can write the "Hello World" program.

Thank you for reading this article carefully. I hope the article "how to install pyenv and flask for raspberry pie" shared by the editor will be helpful to you. At the same time, I also hope you will support us and pay attention to the industry information channel. More related knowledge is waiting for you to learn!

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