After following the steps in this article, you should be in a good position to follow many Python guides and tutorials using RHEL. 10, the final release of the 3. Step 1: Create a New Virtual Python Interpreter. Cross-Platform C++, Python and Java interfaces support Linux, MacOS, Windows, iOS, and Android. py file like below. pip3 install --upgrade tensorflow. These instructions will help you check if pip is on your system, and help you upgrade or install it if necessary. Alternatively, you can click Configure Python interpreter to follow the standard workflow. View Rafael Valle Cabrera's profile on LinkedIn, the world's largest professional community. My issue is that I can't find where the actual files are installed to (because PyCharm IDE doesn't detect that xlsxwriter is actually installed and has that annoying red underline). So here’s how to setup an effective environment for Python on Ubuntu on Windows. 每个应用需要的运行环境经常不同(包的版本/python版本等),所以需要用virtualenv创建一套属于这个程序的“隔离”的Python运行环境。. 또한 pip3도 매번 뒤에 3을 붙이기 싫다면 마찬가지로 pip에 pip3를 링크로 걸어주자. The installation procedure will show how to install Keras: With GPU support, so you can leverage your GPU, CUDA Toolkit, cuDNN, etc. env file and adds them to environment variable. How to Use Windows Command Prompt to Run a Python File. Installing Jupyter using Anaconda and conda ¶. If you're not sure which to choose, learn more about installing packages. 7 in my current PyCharm project and the project's python interpreter was set to python 2. - Hi, I'm Barron Stone and welcome to Python GUI Development with Tkinter. 6: OpenSSL 0. 04 - install virtualenv ubuntu 16. Get the latest release of 3. Stay tuned for more. All-In-One PyGI/PyGObject for Windows Installer. PyCharm is now also available as a snap package. If you decide to bind MySQL to your public IP, you should implement firewall rules that only allow connections from specific IP addresses. I have an Android One with Oreo version and suddenly my Android rebooted and after that it started to behave strangely: 1) Notification section doesn't work. py, and all seems to be right again. Also I have received that "Try to run this command from the system terminal. python-dotenv | Reads the key,value pair from. どうすれば、python3系でbeautifulsoup4が使えるようになりますでしょうか? ご教授宜しくお願い申し上げます。. 1 are deprecated and no longer supported. enter image description here python pycharm. Note: For RHEL 8 installs, See Python on RHEL 8. pycharm 中提示要安装Model包,如图: 但是通过pip3安装不了,错误提示如下: 应该怎么办?谢谢各位。 还是有问题啊?. 5 is in your path. Anaconda conveniently installs Python, the Jupyter Notebook, and other commonly used packages for scientific computing and data science. Linux raspberrypi 4. And it is free. pip3 install pyobjc. by Simon Monk. Hi, I'm new to pycharm and i'm trying to install some packages for some scripts but I can't seem to upgrade the terminal version of pip. For most Unix systems, you must download and compile the source code. It can be installed either to the system Python or a Virtualenv. 3 is the third maintenance release of Python 3. Whilst we focus like a shark-lazer on pygame 2, here is a bonus pygame 1. I'm trying to install packages from within Pycharm in Windows 10. txt with pip3. 7 and it is a 32 bit application. Please feel free to skip to the section that corresponds to your operating system. Everyone interacting in the pip project’s codebases, issue trackers, chat rooms, and mailing lists is expected to follow the PyPA Code of Conduct. PyCharm is the best IDE I've ever used. You are currently viewing LQ as a guest. pip安装pip3 install pyqt5-tools 2. We also work for companies that use Kivy for their professional products. PyCharm 应该是大多数开发者的首选 IDE,每天我们都在上面敲着熟悉的代码,写出一个又一个奇妙的功能。 一个每天都在使用的工具,如果能掌握一些高效的使用技巧,肯定会给我们的开发效率带来质的提升。. a) pyinstaller 설치 >pip3 install pyinstaller. PyCharm (Pie-Charm) is a great IDE for python similar to Visual Studio code, but more mature in its features. If you like conda-forge and want to support our mission, please consider making a donation to support our efforts. To avoid conflicts between parallel Python 2 and Python 3 installations, only the versioned pip3 and pip3. A Visual Studio Code extension with rich support for the Python language (for all actively supported versions of the language: 2. 또한 pip3도 매번 뒤에 3을 붙이기 싫다면 마찬가지로 pip에 pip3를 링크로 걸어주자. Pip is sometimes included automatically when Python is installed to your system, and sometimes you have to install it yourself. 설치 파일을 실행하여 설치 옵션을 기호에 맞게 설정하여 설치하세요. 抛开前面的背景不谈,本篇我们是“PyCharm+miniconda3安装配置教程”,现在回到这个主题上来讲安装配置. How to Install Pip3 on CentOS / Amazon Linux? GitHub Gist: instantly share code, notes, and snippets. 10/31/16 CS360 Pacific University 13 Let's use an If statement Print hello if answer is greater than 7 Print bye if answer is less than 7 Print winner if answer is exactly 7. I'm currently using CentOS-7-x86_64-DVD-1611. The extensions include wrappers for creating and deleting virtual environments and otherwise managing your development workflow, making it easier to work on more than one project at a time without introducing conflicts in their dependencies. Note: For RHEL 8 installs, See Python on RHEL 8. Frequently Asked Question about PokemonGo-Map. Configuring Virtualenv Environment. com,1999:blog-5330875327430496117. Learn about installing packages. If you like conda-forge and want to support our mission, please consider making a donation to support our efforts. Provide Public DNS in HOST and ubuntu as username. Cross-Platform C++, Python and Java interfaces support Linux, MacOS, Windows, iOS, and Android. Installing pip in Pycharm 2016. Tip - How to use pip, git and PyCharm behind a proxy Wed, 01/24/2018 - 06:25 — decalage Sometimes I need to use pip, git, twine and PyCharm behind a proxy, and I have to look up how to configure them. 在pycharm编辑器中主要配置有三个. pip3 install black 复制代码. x version, it comes with the pip3 package manager (which is the program that you are going to need in order for you use to install TensorFlow on Windows) How to Install TensorFlow on Windows: 7 Steps. You can browse for and follow blogs, read recent entries, see what others are viewing or recommending, and request your own blog. For Conda environments you can use the conda package manager. The exact process changes a bit based on which distro head your apt engine points to… try the following (all to be run in a terminal, either in PyCharm or on its own). PyDev already comes preinstalled in LiClipse, so, this step can be skipped (note that if LiClipse is used, PyDev cannot be installed or update separately, as it must always be updated as a whole). Used PyCharm for IDE Implemented email sending functionality. 最后其实pip3和pip没区别,只是pip3是在系统中同时安装python2和3时为了区别两个版本的pip才使用。. 解决方案如下: 在PyCharm内安装需要的库; 使用独立的解释器但是继承公共解释器的库(site-packages) 使用公共解释器(就是安装在系统盘的. x is to have one version of a module implemented in pure Python, with an optional accelerated version implemented as a C extension; for example, pickle and cPickle. python3 train_mineral_shards. 7,这里记录一下安装最新版3. i have a problem with installing some packages on my pycharm. Install a package that’s already been downloaded from PyPI or obtained from elsewhere. Finally, the PyCharm Community Edition Features are: Lightweight IDE for Python development. PyCharm Professional Community Educational PhpStorm WebStorm RubyMine AppCode CLion GoLand. This video will help you out how to use PIP INSTALL Command in python. Both Tk and tkinter are available on most Unix platforms, as well as on Windows systems. Pyzo is a Python IDE that works with any Python interpreter installed on your system, including Conda environments. Otherwise, install Python , the pip package manager , and Virtualenv :. 4のpipも同様にPyCharmでアップグレードしたあと、pip3. virtualenv介绍. Used PyCharm for IDE Implemented email sending functionality. x PythonVersion = 3 from tkinter. Any hope for my use case being supported?. ★★★Top Online Courses From ProgrammingKnowledge ★★★ Python Programming. I didn't have it, but you may. Just download the files and run the setup program. PyCharm will highlight most coding errors and typos. 04 - install virtualenv ubuntu 16. python3 train_mineral_shards. Why do you need the 'sudo apt-get update' to install pip3? seems rather unexpected to me. PyCharm (Pie-Charm) is a great IDE for python similar to Visual Studio code, but more mature in its features. X使用的包管理工具,pip是python2. sudo apt install python3-pip Tags: pip, pycharm, python. Python 3 is the latest version of the language, and is incompatible with Python 2. Finally, the PyCharm Community Edition Features are: Lightweight IDE for Python development. , for faster network training. systemd service running from pipenv. Original post: TensorFlow is the new machine learning library released by Google. Kivy is a community project, led by professional software developers. But PyCharm so far only supports a remote interpreter. PyCharm Community Edition is the free version of PyCharm, an IDE aimed at Python programmers. Pycharm is a free and open source cross-platform IDE (Integrated Development Environment) editor for developers to edit their source code. This article will help you to install Python 3. But I can't update others packages and I have received messages that "AttributeError: module 'pip' has no attribute 'main'". One of the easiest way is to use pip command line tool. How to get Django. This tutorial will get you up and running with a local Python 3 programming environment in Ubuntu 16. tkinterIs it? This is a built-in module that can be used directly without installation. View Rafael Valle Cabrera's profile on LinkedIn, the world's largest professional community. Make sure the venv is inside your project folder. 3' 4 Setup the IDE. How to Install Python 3. Open the command line interface and tell PIP to download the package you want. a) pyinstaller 설치 >pip3 install pyinstaller. Since Python 3. a) PyCharm 실행 b) File - Settings 실행 c) Project: {프로젝트이름} - Project Interpreter 실행 d) 설치한 패키지 목록들이 나오는데 우측에 + 버튼을 눌러 qt추가 e) 검색창에 pyqt5라고 검색을 하고, "PyQt5" 패키지를 설치. 7 as the default tool. Raspberry Pi GUI Libraries. 参看文献:Python3 PyQt5 pycharm 环境搭建python3. How to Install Django 1. Matplotlib compiled fine, but nothing shows up when I use it¶. 7 and it is a 32 bit application. Hello everyone. Download a Package. Pycharm ile açtığınız projeye yeni bir modül yüklemek istediğinizde ise source venv/bin/activate komutu ile geliştirme ortamınıza bağlanabilir sonrasında pip3 ile istediğiniz paketi. 在pycharm编辑器中主要配置有三个. Pip is sometimes included automatically when Python is installed to your system, and sometimes you have to install it yourself. py file like below. I just started teaching myself how to program, and I'm using Python 3. pip安装pip3 install pyqt5-tools 2. By default, PyCharm uses pip to manage project packages. With PyCharm, you can access the command line, connect to a database, create a virtual environment, and manage your version control system all in one place, saving time by avoiding constantly switching between windows. Get the latest release of 3. Installing Jupyter using Anaconda and conda ¶. Otherwise, install Python , the pip package manager , and Virtualenv :. 6 on CentOS/RHEL & Fedora systems. If you cannot, or would prefer not to, use pip, you can download the package from PyPI. But I can't update others packages and I have received messages that "AttributeError: module 'pip' has no attribute 'main'". To ensure the successful installation, run the following Python code: import PyQt5. By default, PyCharm uses pip to manage project packages. 선행작업: 윈도우 Python, easy_install, pip 설치 PyCharm 설치, 설정, 프로젝트. Revision 2db6356f. pyでインストール、といった方法がありますが、Pythonのバージョンの違うpipの使い分けを考えないと. Please feel free to skip to the section that corresponds to your operating system. If you are running El Capitan and have problems installing pyobjc try: MACOSX_DEPLOYMENT_TARGET=10. Using pip3 to install Python3 modules. I recommend pycharm if you're new … because it's going to let you build environments VS. 1 and I clicked update, expecting it to be updated to the latest version. Although some of the functionality of these two tools overlap, they were designed and should be used for different purposes. Portable Python is not being developed anymore. Python is a powerful programming language. ★★★Top Online Courses From ProgrammingKnowledge ★★★ Python Programming. Installing Jupyter using Anaconda and conda ¶. See the complete profile on LinkedIn and discover Rafael's connections and jobs at similar companies. Downloading your Python. ive got an older version of pycharm since ive got an older ios. 1 and I clicked update, expecting it to be updated to the latest version. I have installed Python 2. 比如 sudo pip install pandas. At the moment there are several better and more up-to-date alternatives: PythonXY. Installing latest Python version by compiling source code on CentOS. cannot create bootstrap scripts, cannot create virtual environments for other python versions than. $ pip3 install PyQt5. you clearly have Python 2. tkinterIs it? This is a built-in module that can be used directly without installation. I do have pycharm which I use often, so I do have python; however, I don’t really understand how to connect my atom with my python. I know I can download the zip file to install pyperclip, but. 4 binaries that are downloaded from python. Pythonのパッケージ管理システムであるpipの使い方をまとめました。まだ使用したことのない機能もあるので、今後使用するタイミングがあれば随時追加していきます。. 2019년 8월 7일에 추가. But PyCharm so far only supports a remote interpreter. C:\Python34>lib\site-packages\pip install Django 'lib\site-packages\pip' is not recognized as an internal or external command, operable program or batch file. 3 -Vと同様に起動できません。 このままでもPyCharmを使えばPythonパッケージの扱いは問題ないのですが、Terminalから実行できないのはどうも気持ちが悪いので修正することに. 3) Python-based scientific environment:. 4 binaries that are downloaded from python. pip3 install -U otree If you will use PyCharm or another text-based code editor, follow the steps here. What is Python? Python is a widely-used programming language used in many of the computer science classes here at St. Python is a versatile programming language that can be used for many different programming projects. $ pip3 install virtualenv 然后,假定我们要开发一个新的项目,需要一套独立的Python运行环境,可以这么做: 第一步,创建目录: Mac:~ michael$ mkdir myproject Mac:~ michael$ cd myproject/ Mac:myproject michael$ 第二步,创建一个独立的Python运行环境,命名为venv:. This article shows how to install Python 3, pip, venv, virtualenv, and pipenv on Red Hat Enterprise Linux 7. If you want to learn programming join us. No there’s something seriously wrong with either my settings or pycharm. ttk import * from tkinter. I just started teaching myself how to program, and I'm using Python 3. s search c compose new post r reply e edit t go to top j go to the next post or comment k go to the previous post or comment o toggle comment visibility esc cancel. hey guyys, im new to python and pycharm, ive been trying to download beautifulsoup4 package onto pycharm with no success. If it is not detected, then it means that it is not installed on your machine or PyCharm couldn't find it for some reason. Downloading a package is very easy. The IDE is aimed at interactivity and simplicity, and consists of an editor, a shell, and a set of tools to help the programmer in various ways. py module available in python 3. virtualenv is a tool to create isolated Python environments. 설치 파일을 실행하여 설치 옵션을 기호에 맞게 설정하여 설치하세요. How to use Pytest in Pycharm? In this section, you will learn step by step to configure and use Pytest in Pycharm. This section covers the basics of how to install Python packages. It is only available if you've installed a custom version of Python 3. Download the file for your platform. Pycharm ile açtığınız projeye yeni bir modül yüklemek istediğinizde ise source venv/bin/activate komutu ile geliştirme ortamınıza bağlanabilir sonrasında pip3 ile istediğiniz paketi. 윈도우에서 PyCharm을 이용한 Python 개발 및 디버깅을 위한 포스팅 3번째 오늘은 virtualenv를 사용하는 방법을 알아보려한다. post-386780192187270038 2019-09-18T05:34:00. Note: right now, the latest commits of Pysolar don't work with Python 2. html > The urllib2 module has been split across several modules in Python 3 named urllib. If you're on linux/Mac you might need to use sudo: sudo pip3 install appjar. Considering Nokia’s High demand in 2010, it was temporarily unavailable. It is great for managing app settings during development and in production using 12-factor principles. by Simon Monk. font import Font from tkinter. It will be most helpful to include a reproducible example on one of the example datasets (accessed through load_dataset()). $ pip3 install PyQt5. We recommend using an user install, sending the --user flag to pip. 2+ you can run pip install spacy[lookups] or install spacy-lookups-data separately. Note though, that the venv module does not offer all features of this library (e. 1 安装PyQt5,以及配置QTDesigner,PyUIC 注意:测试环境为Python3. 3 is the third maintenance release of Python 3. February 11, 2017 - python. ttk import * from tkinter. 3' 4 Setup the IDE. If it is not detected, then it means that it is not installed on your machine or PyCharm couldn't find it for some reason. The face-boxer. Installing Python Modules¶ Email. A Visual Studio Code extension with rich support for the Python language (for all actively supported versions of the language: 2. It can be installed either to the system Python or a Virtualenv. this is the screen i get in pycharm where i am suppossed to download the package from: https://ibb. cx_Oracle的使用上没有什么问题,一切按套路来写就可以了。贴一个简单的示例:. Tensorflow tutorial 使用 pip 作為 package management [1]. For more details, see Using pip from your program. Open a terminal prompt (such as OS X's Terminal, or Windows' Command Prompt) and type the command:. messagebox import *. Use MySQL databases settings to replace default SQLite3 database settings in Django project settings. (voir plus bas pour la sortie d'écran après l'exécution de la commande pip install jinja2). Watch Now This tutorial has a related video course created by the Real Python team. Mac中,需要本地运行起来一个Django项目,结果:. tensorflow libtensorflow/libtensorflow_jni-gpu-linux-x86_64-1. sudo apt install python3-pip Tags: pip, pycharm, python. There are as yet few distribution-ready packages. I have designed this TensorFlow tutorial for professionals and enthusiasts who are interested in applying Deep Learning Algorithm using TensorFlow to solve various problems. In this tutorial, we will show you how to install Python Pip on Ubuntu 18. 3, which I use with pycharm to do other stuff like make basic games and whatnot. x is to have one version of a module implemented in pure Python, with an optional accelerated version implemented as a C extension; for example, pickle and cPickle. 04 - install virtualenv ubuntu 16. Pip is a special program used to install Python packages to your system. app 디렉토리를 생성하고 하위. 创建Pytorch所需环境,输入命令conda create -n torch python=3. But I can't update others packages and I have received messages that "AttributeError: module 'pip' has no attribute 'main'". PyCharm是一种Python的编译器。当然,如果不是初学者,可以根据自己的喜好选择自己喜欢的编辑器。我们这里推荐使用PyCharm,更方便一起交流学习。 到官网下载pycharm安装包,我们选择免费版(Community)就行了。. python3就是3的版本 pip3是3的版本. PyCharm is the best IDE I've ever used. I'm trying to install packages from within Pycharm in Windows 10. When I was using PIP version 9. The lookups package is needed to create blank models with lemmatization data, and to lemmatize in languages that don’t yet come with pretrained models and aren’t powered by third-party libraries. As of February, 2017, you can just run pip install pygame and it will install the right version of pygame for your environment. In 2010, I shortlisted LG optimus one and Nokia C5-03. It is only available if you've installed a custom version of Python 3. For GPU TensorFlow version run the command: pip3 install --upgrade tensorflow-gpu. a) PyCharm 실행 b) File - Settings 실행 c) Project: {프로젝트이름} - Project Interpreter 실행 d) 설치한 패키지 목록들이 나오는데 우측에 + 버튼을 눌러 qt추가 e) 검색창에 pyqt5라고 검색을 하고, "PyQt5" 패키지를 설치. Method 1 : Yes you can use anaconda navigator for installing new python packages. The new introduction of the Windows subsystem for Linux allows developers to have full access to a Linux distribution within Windows and without the overhead of a virtual-box. 패키지 설치를 위한 가상환경 만들기 포스트를 참고하자. and PyCharm will suggest all possible methods and properties. We show you how to install Virtualenv for Python. X version you can install PIP3 using the following linux How to install PyCharm on Ubuntu 18. PyCharm enables developers to write, test, debug and deploy code faster. org/2/library/urllib2. In this guide, the commands shown assume you have Python v3 installed and the pip commands shown use the pip3 version. # try with --user if get permission errors Note: pip3 can be installed with 'sudo apt-get install python3-pip' Note: it is recomended pip3 version 9. python-telegram-bot is distributed under a LGPLv3 license. 04 and go through the basics of how to install and manage Python packages with pip. If you’re on Ubuntu 16. Installation under windows is especially. 步骤为:"super+R" --> "cmd" -> "pip3 install opencv-python" (pip3是python3. 3, Mac OS 10. TensorFlow’s neural networks are expressed in the form of stateful dataflow graphs. Linting highlights syntactical and stylistic problems in your Python source code, which oftentimes helps you identify and correct subtle programming errors or unconventional coding practices that can lead to errors. Please choose the correct "Pipenv executable" path. When you install a custom version, pip3 is installed with it. Download the community edition of PyCharm for the Mac from the `Jetbrains website `_. PyCharm CE 2018. sudo pip3 uninstall cx_Oracle sudo pip3 install cx_Oracle 重启PyCharm后,问题解决。 cx_Oracle的简单使用. x, pycharm said to me. PyCharm Community Edition is the free version of PyCharm, an IDE aimed at Python programmers. pip3 install PyObjC arcade. Allowing unrestricted access to MySQL on a public IP not advised but you may change the address it listens on by modifying the bind-address parameter in /etc/my. Installing Jupyter using Anaconda and conda ¶. 또한 pip3도 매번 뒤에 3을 붙이기 싫다면 마찬가지로 pip에 pip3를 링크로 걸어주자. + 버튼을 눌러 설정을 추가하고 이름을 설정한다. 两版本mac自带 直接加版本号. The lookups package is needed to create blank models with lemmatization data, and to lemmatize in languages that don’t yet come with pretrained models and aren’t powered by third-party libraries. For example, if your Qt installation is 32 bits, and your Python installation is 32 bits and 64 bits then you will need to specify --use-arch i386 to ensure that pyuic4 runs the 32 bit. Pycharm 공식 홈페이지. First make sure that python 3. A Visual Studio Code extension with rich support for the Python language (for all actively supported versions of the language: 2. To get things started we will try to run a very simple GTK based GUI application using the PyGObject provided Python bindings. 10, the final release of the 3. 04にて、知らんぷりしてpip3コマンドを入力してみると、以下のようなエラーメッセージが出た。 $ pip3 プログラム 'pip3' はまだインストールされていません。. How to install SDL varies depending on your platform. Basemap is deprecated in favor of the Cartopy project. (Tk itself is not part of Python; it is maintained at ActiveState. Hi, I'm new to pycharm and i'm trying to install some packages for some scripts but I can't seem to upgrade the terminal version of pip. tqdm does not require any dependencies (not even curses!), just Python and an environment supporting carriage return \r and line feed \n control characters. x, then you will be using the command pip3. html > The urllib2 module has been split across several modules in Python 3 named urllib. Install Python3 and pip3 on CentOS 7 Krishna Prajapati November 29, 2016 - 4:24 pm January 26, 2017 Linux , Python CentOS 7 still have Python 2. 7 and it is a 32 bit application. 78-v7+ #1084 SMP Thu Jan 25 18:05:49 GMT 2018 armv7l GNU/Linux I am on Raspbian Jessie and I had to install python 3. You are currently viewing LQ as a guest. tensorflow libtensorflow/libtensorflow_jni-gpu-linux-x86_64-1. pycharm下如何将默认的pip源改成国内能快速访问的源,以及如何进行包管理pycharm 是一款进行python项目开发的利器,不过还是有新手在使用pycharm时,并不知道如何进行包管理,pip. You should now be able to run python3 start. The Twilio Python Helper Library makes it easy to interact with the Twilio API from your Python application. It is done to get rid of any conflicts. However, a key feature of Cloudera Data Science Workbench is the ability of different projects to install and use libraries pinned to specific versions, just as you would on your local computer. First make sure that python 3. python points to Homebrew’s Python 2. Although some of the functionality of these two tools overlap, they were designed and should be used for different purposes. First create a small Python script called hello. Rafael has 4 jobs listed on their profile. So if you find it useful then do let us know in the comment section below, would love to hear that. 예를 들어, Java라는 언어를 사용하신다면 대표적인 개발 도구가 eclipse인 것처럼 python을 가장 편하게 사용하게 해주는 개발도구 중 하나가 바로 pycharm입니다. The Pro edition isn't free and is required to interact with WSL, but if you want to make the purchase, here are a few tips for setting it up to work with WSL and Airflow. TensorFlow is an open-source machine learning software built by Google to train neural networks. See notes in Cartopy, New Management, and EoL Announcement for more details. In this mechanism, we will download and install anaconda, then we can create a conda environment, using name TensorFlow with this command: $ conda -n tensorflow. These instructions assume that you do not already have Python installed on your machine. 4のpipも同様にPyCharmでアップグレードしたあと、pip3. If you are using the default installed Python 2. If you already have a development environment set up, see Python and GCP to get an overview of how to run Python apps on GCP. Click on + to add a new python interpreter and then click on SSH interpreter. PyPI helps you find and install software developed and shared by the Python community. If you're on Ubuntu 16. Each node in the graph represents the operations performed by neural networks on multi-dimensional arrays. virtualenv is a tool to create isolated Python environments. python就是2的版本 pip是2的版本.