mynotes

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====== Python Virtual Environment ======

===== venv Module =====

<Code:none>
Required Debian Package:
ii  python3.11-venv          3.11.2-6          amd64          Interactive high-level object-oriented language (pyvenv binary, version 3.11)

srohr@pluto:~/Projects/Python$ mkdir project1
srohr@pluto:~/Projects/Python$ python3 -m venv ./project1/venv
srohr@pluto:~/Projects/Python$ source cd project1
srohr@pluto:~/Projects/Python/project1$ source ./venv/bin/activate

(venv) srohr@pluto:~/Projects/Python/project1$ pip list
Package    Version
---------- -------
pip        23.0.1
setuptools 66.1.1

(venv) srohr@pluto:~/Projects/Python/project1$ pip freeze

(venv) srohr@pluto:~/Projects/Python/project1$ pip freeze --local

(venv) srohr@pluto:~/Projects/Python/project1$ pip install flask
Collecting flask
  Downloading flask-3.0.0-py3-none-any.whl (99 kB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 99.7/99.7 kB 2.1 MB/s eta 0:00:00
Collecting Werkzeug>=3.0.0
  Downloading werkzeug-3.0.1-py3-none-any.whl (226 kB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 226.7/226.7 kB 7.4 MB/s eta 0:00:00
Collecting Jinja2>=3.1.2
  Downloading Jinja2-3.1.2-py3-none-any.whl (133 kB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 133.1/133.1 kB 5.3 MB/s eta 0:00:00
Collecting itsdangerous>=2.1.2
  Downloading itsdangerous-2.1.2-py3-none-any.whl (15 kB)
Collecting click>=8.1.3
  Downloading click-8.1.7-py3-none-any.whl (97 kB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 97.9/97.9 kB 5.2 MB/s eta 0:00:00
Collecting blinker>=1.6.2
  Downloading blinker-1.7.0-py3-none-any.whl (13 kB)
Collecting MarkupSafe>=2.0
  Downloading MarkupSafe-2.1.3-cp311-cp311-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (28 kB)
Installing collected packages: MarkupSafe, itsdangerous, click, blinker, Werkzeug, Jinja2, flask
Successfully installed Jinja2-3.1.2 MarkupSafe-2.1.3 Werkzeug-3.0.1 blinker-1.7.0 click-8.1.7 flask-3.0.0 itsdangerous-2.1.2

(venv) srohr@pluto:~/Projects/Python/project1$ pip freeze
blinker==1.7.0
click==8.1.7
Flask==3.0.0
itsdangerous==2.1.2
Jinja2==3.1.2
MarkupSafe==2.1.3
Werkzeug==3.0.1

(venv) srohr@pluto:~/Projects/Python/project1$ 

(venv) srohr@pluto:~/Projects/Python/project1$ pip freeze > ../requirements.txt

(venv) srohr@pluto:~/Projects/Python/project1$ cat ../requirements.txt 
blinker==1.7.0
click==8.1.7
Flask==3.0.0
itsdangerous==2.1.2
Jinja2==3.1.2
MarkupSafe==2.1.3
Werkzeug==3.0.1

(venv) srohr@pluto:~/Projects/Python/project1$ deactivate 
srohr@pluto:~/Projects/Python/project1$ 

</Code>

requirements.txt can be a simple file with all the modules listed
<Code:none>
blinker
click
Flask
itsdangerous
Jinja2
MarkupSafe
Werkzeug
</Code>

It is also possible to download exact versions of a module or a range of versions
<Code:none>
blinker>=1.6.0,<1.6.5
click==8.1.7
Flask>=3.0.0
</Code>

The requirements.txt file can be used to install all the packages listed in the file within a new environment.
<Code:none>
srohr@pluto:~/Projects/Python$ mkdir project2
srohr@pluto:~/Projects/Python$ python3 -m venv ./project2/venv
srohr@pluto:~/Projects/Python$ source ./project2/venv/bin/activate
(venv) srohr@pluto:~/Projects/Python$ pip install -r ./project1/venv/
bin/        include/    lib/        lib64/      pyvenv.cfg  
(venv) srohr@pluto:~/Projects/Python$ #pip install -r ../requirements.txt 
(venv) srohr@pluto:~/Projects/Python$ pip freeze
(venv) srohr@pluto:~/Projects/Python$ pip list
Package    Version
---------- -------
pip        23.0.1
setuptools 66.1.1
(venv) srohr@pluto:~/Projects/Python$ pip install -r ../requirements.txt 
Collecting blinker==1.7.0
  Using cached blinker-1.7.0-py3-none-any.whl (13 kB)
Collecting click==8.1.7
  Using cached click-8.1.7-py3-none-any.whl (97 kB)
Collecting Flask==3.0.0
  Using cached flask-3.0.0-py3-none-any.whl (99 kB)
Collecting itsdangerous==2.1.2
  Using cached itsdangerous-2.1.2-py3-none-any.whl (15 kB)
Collecting Jinja2==3.1.2
  Using cached Jinja2-3.1.2-py3-none-any.whl (133 kB)
Collecting MarkupSafe==2.1.3
  Using cached MarkupSafe-2.1.3-cp311-cp311-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (28 kB)
Collecting Werkzeug==3.0.1
  Using cached werkzeug-3.0.1-py3-none-any.whl (226 kB)
Installing collected packages: MarkupSafe, itsdangerous, click, blinker, Werkzeug, Jinja2, Flask
Successfully installed Flask-3.0.0 Jinja2-3.1.2 MarkupSafe-2.1.3 Werkzeug-3.0.1 blinker-1.7.0 click-8.1.7 itsdangerous-2.1.2
(venv) srohr@pluto:~/Projects/Python$ pip list
Package      Version
------------ -------
blinker      1.7.0
click        8.1.7
Flask        3.0.0
itsdangerous 2.1.2
Jinja2       3.1.2
MarkupSafe   2.1.3
pip          23.0.1
setuptools   66.1.1
Werkzeug     3.0.1
(venv) srohr@pluto:~/Projects/Python$ pip freeze
blinker==1.7.0
click==8.1.7
Flask==3.0.0
itsdangerous==2.1.2
Jinja2==3.1.2
MarkupSafe==2.1.3
Werkzeug==3.0.1
(venv) srohr@pluto:~/Projects/Python$
</Code>


<Code:none>
srohr@pluto:~/Projects/Python$ mkdir project3
srohr@pluto:~/Projects/Python$ python3 -m venv ./project3/venv --system-site-packages
srohr@pluto:~/Projects/Python$ cd project3/
srohr@pluto:~/Projects/Python/project3$ source venv/bin/activate
(venv) srohr@pluto:~/Projects/Python/project3$ pip list
Package            Version
------------------ ----------
anyio              3.6.2
attrs              22.2.0
blinker            1.5
Brlapi             0.8.4
certifi            2022.9.24
chardet            5.1.0
charset-normalizer 3.0.1
click              8.1.3
colorama           0.4.6
crit               3.17.1
cryptography       38.0.4
cupshelpers        1.0
dbus-python        1.3.2
distlib            0.3.6
distro             1.8.0
distro-info        1.5
dnspython          2.3.0
docker             5.0.3
docker-compose     1.29.2
dockerpty          0.4.1
docopt             0.6.2
feedparser         6.0.10
filelock           3.9.0
fuse-python        1.0.5
GDAL               3.6.2
gpg                1.18.0
h11                0.14.0
h2                 4.1.0
hpack              4.0.0
httpcore           0.16.3
httplib2           0.20.4
httpx              0.23.3
hyperframe         6.0.0
idna               3.3
jsonpointer        2.3
jsonschema         4.10.3
lazr.restfulclient 0.14.5
lazr.uri           1.0.6
louis              3.24.0
Mako               1.2.4.dev0
Markdown           3.4.1
markdown-it-py     2.1.0
MarkupSafe         2.1.2
mdurl              0.1.2
musicbrainzngs     0.7.1
mutagen            1.46.0
numpy              1.24.2
oauthlib           3.2.2
pip                23.0.1
platformdirs       2.6.0
protobuf           4.21.12
pycairo            1.20.1
pycups             2.0.1
pycurl             7.45.2
Pygments           2.14.0
PyGObject          3.42.2
pyinotify          0.9.6
PyJWT              2.6.0
pylibacl           0.7.0
pyparsing          3.0.9
PyQt5              5.15.9
PyQt5-sip          12.11.1
pyrsistent         0.18.1
PySimpleSOAP       1.16.2
pysmbc             1.0.23
python-apt         2.6.0
python-dateutil    2.8.2
python-debian      0.1.49
python-debianbts   4.0.1
python-dotenv      0.21.0
pyxattr            0.8.1
pyxdg              0.28
PyYAML             6.0
quodlibet          4.5.0
reportbug          12.0.0
requests           2.28.1
requests-toolbelt  0.10.1
rfc3986            1.5.0
rfc3987            1.3.8
rich               13.3.1
setuptools         66.1.1
sgmllib3k          1.0.0
six                1.16.0
sniffio            1.2.0
texttable          1.6.7
tornado            6.2
uritemplate        4.1.1
urllib3            1.26.12
virtualenv         20.17.1+ds
wadllib            1.3.6
webcolors          1.11.1
websocket-client   1.2.3
wheel              0.38.4
xdg                5
(venv) srohr@pluto:~/Projects/Python/project3$ pip freeze
anyio==3.6.2
attrs==22.2.0
blinker==1.5
Brlapi==0.8.4
certifi==2022.9.24
chardet==5.1.0
charset-normalizer==3.0.1
click==8.1.3
colorama==0.4.6
crit==3.17.1
cryptography==38.0.4
cupshelpers==1.0
dbus-python==1.3.2
distlib==0.3.6
distro==1.8.0
distro-info==1.5
dnspython==2.3.0
docker==5.0.3
docker-compose==1.29.2
dockerpty==0.4.1
docopt==0.6.2
feedparser==6.0.10
filelock==3.9.0
fuse-python==1.0.5
GDAL==3.6.2
gpg==1.18.0
h11==0.14.0
h2==4.1.0
hpack==4.0.0
httpcore==0.16.3
httplib2==0.20.4
httpx==0.23.3
hyperframe==6.0.0
idna==3.3
jsonpointer==2.3
jsonschema==4.10.3
lazr.restfulclient==0.14.5
lazr.uri==1.0.6
louis==3.24.0
Mako==1.2.4.dev0
Markdown==3.4.1
markdown-it-py==2.1.0
MarkupSafe==2.1.2
mdurl==0.1.2
musicbrainzngs==0.7.1
mutagen==1.46.0
numpy==1.24.2
oauthlib==3.2.2
platformdirs==2.6.0
protobuf==4.21.12
pycairo==1.20.1
pycups==2.0.1
pycurl==7.45.2
Pygments==2.14.0
PyGObject==3.42.2
pyinotify==0.9.6
PyJWT==2.6.0
pylibacl==0.7.0
pyparsing==3.0.9
PyQt5==5.15.9
PyQt5-sip==12.11.1
pyrsistent==0.18.1
PySimpleSOAP==1.16.2
pysmbc==1.0.23
python-apt==2.6.0
python-dateutil==2.8.2
python-debian==0.1.49
python-debianbts==4.0.1
python-dotenv==0.21.0
pyxattr==0.8.1
pyxdg==0.28
PyYAML==6.0
quodlibet==4.5.0
reportbug==12.0.0
requests==2.28.1
requests-toolbelt==0.10.1
rfc3986==1.5.0
rfc3987==1.3.8
rich==13.3.1
sgmllib3k==1.0.0
six==1.16.0
sniffio==1.2.0
texttable==1.6.7
tornado==6.2
uritemplate==4.1.1
urllib3==1.26.12
virtualenv==20.17.1+ds
wadllib==1.3.6
webcolors==1.11.1
websocket-client==1.2.3
xdg==5
(venv) srohr@pluto:~/Projects/Python/project3$ 
</Code>

===== virtualenv Module =====