Python 使用flask执行hello world“ImportError：没有名为flask的模块”
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execute hello world with flask "ImportError: No module named flask"
提问by Lindages
I'm trying to use flask and python. I did a simple file named hello.py. tHis file contains this code:
我正在尝试使用烧瓶和 python。我做了一个名为hello.py. tHis 文件包含以下代码：
from flask import Flask
app = Flask(__name__)
@app.route("/")
def main():
return "Welcome!"
if __name__ == "__main__":
app.run()
This is a simple hello world with flask. I want to execute it but actually, I have a problem. In the terminal, I typed python hello.pyand I get this error:
这是一个带有烧瓶的简单 hello world。我想执行它，但实际上，我遇到了问题。在终端中，我输入python hello.py并收到此错误：
File "hello.py", line 1, in <module>
from flask import Flask
ImportError: No module named flask
Even that I installed flask globally. I understand that this is a basic question, but I'm stuck?
即使我在全球安装了烧瓶。我知道这是一个基本问题，但我被卡住了？
回答by Tomasz Jakub Rup
You don't have installed flask
你还没有安装 flask
Linux:
Linux：
Install flaskas global package:
安装flask为全局包：
sudo pip install flask
Install in virtualenv
在 virtualenv 中安装
virtualenv venv
source venv
pip install flask
Install system package
安装系统包
debian, ubuntu
apt-get install python-flaskarch
pacman -S python-flaskfedora
yum install python-flask
Debian, Ubuntu
apt-get install python-flask拱
pacman -S python-flask软呢帽
yum install python-flask
Install via Anaconda
通过Anaconda安装
conda install flask
Windows:
视窗：
python -m pip install flask
回答by Ata
You've installed flask for python2 you need to use sudo pip3 install ... to get it for python3. I had spent a day when I got that I was using pip for python 2.
你已经为 python2 安装了烧瓶，你需要使用 sudo pip3 install ... 来为 python3 获取它。我花了一天的时间才知道我正在将 pip 用于 python 2。
