导出pip安装的所有的包：
pip freeze > piplist.txt
在新的环境中安装导出的包
pip install -r piplist.txt
astroid==2.3.3
autopep8==1.5
beautifulsoup4==4.9.0
certifi==2020.4.5.1
chardet==3.0.4
Django==2.0
django-shortuuidfield==0.1.3
get==2019.4.13
idna==2.9
isort==4.3.21
lazy-object-proxy==1.4.3
lxml==4.5.0
mccabe==0.6.1
post==2019.4.13
public==2019.4.13
pycodestyle==2.5.0
pylint==2.4.4
pylint-django==2.0.14
pylint-plugin-utils==0.6
PyMySQL==0.9.3
python-memcached==1.59
pytz==2019.3
query-string==2019.4.13
redis==3.4.1
requests==2.23.0
shortuuid==1.0.1
six==1.14.0
soupsieve==2.0
typed-ast==1.4.1
urllib3==1.25.8
wrapt==1.11.2
yapf==0.29.0
appdirs==1.4.3
asn1crypto==0.24.0
catfish==1.4.4
certifi==2018.1.18
chardet==3.0.4
command-not-found==0.3
cryptography==2.1.4
cupshelpers==1.0
defer==1.0.6
distlib==0.3.0
distro-info===0.18ubuntu0.18.04.1
filelock==3.0.12
httplib2==0.9.2
idna==2.6
importlib-metadata==1.5.0
importlib-resources==1.3.1
kazam==1.4.5
keyring==10.6.0
keyrings.alt==3.0
language-selector==0.1
launchpadlib==1.10.6
lazr.restfulclient==0.13.5
lazr.uri==1.0.3
lightdm-gtk-greeter-settings==1.2.2
meld==3.18.0
menulibre==2.2.0
mugshot==0.4.0
netifaces==0.10.4
oauth==1.0.1
olefile==0.45.1
onboard==1.4.1
pbr==5.4.4
pexpect==4.2.1
Pillow==5.1.0
psutil==5.4.2
pycairo==1.16.2
pycrypto==2.6.1
pycups==1.9.73
pycurl==7.43.0.1
pygobject==3.26.1
python-apt==1.6.5+ubuntu0.2
python-dateutil==2.6.1
python-debian==0.1.32
python-debianbts==2.7.2
python-magic==0.4.16
pyxattr==0.6.0
pyxdg==0.25
PyYAML==3.12
reportlab==3.4.0
requests==2.18.4
requests-unixsocket==0.1.5
SecretStorage==2.3.1
sgt-launcher==0.2.4
simplejson==3.13.2
six==1.14.0
stevedore==1.32.0
systemd-python==234
ubuntu-drivers-common==0.0.0
ufw==0.36
unattended-upgrades==0.1
urllib3==1.22
vboxapi==1.0
virtualenv==20.0.10
virtualenv-clone==0.5.3
virtualenvwrapper==4.8.4
wadllib==1.3.2
xcffib==0.5.1
xkit==0.0.0
you-get==0.4.1432
youtube-dl==2020.3.8
zipp==3.1.0
zope.interface==4.3.2