ModuleNotFoundError:导入烧瓶时，没有名为"string"的模块
我的PC上有我的项目.我正在尝试在其他PC上传输它.我在虚拟环境中安装了每个软件包，例如flask，flask-security等，它在我的PC上运行良好.
I have my project working on my pc. I am trying to transfer it on different PC. I have every package installed in virtualenvironment like flask, flask-security etc and it works great on my pc.
但是，当我将其传输到另一台PC时，它会失败.它甚至无法导入Flask并失败.
But when I transfer it to other pc it fails. It cannot even import the Flask and fails with .
(env) E:\quickAuto>env\Scripts\python.exe
Python 3.6.5 |Anaconda, Inc.| (default, Mar 29 2018, 13:32:41) [MSC v.1900 64 bi
t(AMD64)]在Win32上键入帮助"，版权"，信用"或许可证"以获取更多信息.从烧瓶进口烧瓶
t (AMD64)] on win32 Type "help", "copyright", "credits" or "license" for more information. from flask import Flask
回溯(最近通话最近):文件"，第1行，在在第17行中的文件"E:\ quickAuto \ env \ lib \ site-packages \ flask__init __.py"从werkzeug.exceptions导入中止文件"E:\ quickAuto \ env \ lib \ site-packages \ werkzeug__init __.py"，第151行，在导入("werkzeug.exceptions")文件"E:\ quickAuto \ env \ lib \ site-packages \ werkzeug \ exceptions.py"，第67行，
在从werkzeug._internal导入_get_environ文件"E:\ quickAuto \ env \ lib \ site-packages \ werkzeug_internal.py"，第12行在导入字符串ModuleNotFoundError:没有名为字符串"的模块
Traceback (most recent call last): File "", line 1, in File "E:\quickAuto\env\lib\site-packages\flask__init__.py", line 17, in from werkzeug.exceptions import abort File "E:\quickAuto\env\lib\site-packages\werkzeug__init__.py", line 151, in import('werkzeug.exceptions') File "E:\quickAuto\env\lib\site-packages\werkzeug\exceptions.py", line 67,
in from werkzeug._internal import _get_environ File "E:\quickAuto\env\lib\site-packages\werkzeug_internal.py", line 12, in import string ModuleNotFoundError: No module named 'string'
如果使用 virtualenv 文件夹复制所有项目，这是一个不好的做法，则只需复制具有> requirements.txt 文件，然后从 requirements.txt 安装所有软件包，例如:
If you copy all project with the virtualenv folder this is a bad practice, you need only to copy the project with the requirements.txt file, and install all packages from requirements.txt for example:
# activate your virtualenv on your PC
. env/bin/activate
# now we need to create a requirements.txt file with `pip freeze`
pip freeze > requirements.txt
# now in our folder we have a `requirements.txt` file with all our packages
# after this copy all your packge without `virtualenv` folder,
# but with `requirements.txt file
# when you are on another PC create a new `virtualenv` activate it and install
# the packages from `requirements.txt` with this command
pip install -r requirements.txt