Done on Linux (Ubuntu tested)
cd $HOME
virtualenv --python=/usr/bin/python2.7 pgadmin4
source pgadmin4/bin/activate
pip2.7 install https://ftp.postgresql.org/pub/pgadmin/pgadmin4/v1.5/pip/pgadmin4-1.5-py2.py3-none-any.whl
echo "# coding: utf-8
from config import *
SERVER_MODE = False
# Secret key for signing CSRF data. Override this in config_local.py if
# running on a web server
CSRF_SESSION_KEY = 'MyAlternateSuperSecret1'
# Secret key for signing cookies. Override this in config_local.py if
# running on a web server
SECRET_KEY = 'MyAlternateSuperSecret2'
# Salt used when hashing passwords. Override this in config_local.py if
# running on a web server
SECURITY_PASSWORD_SALT = 'MyAlternateSuperSecret3'
" > $(python -c "from distutils.sysconfig import get_python_lib; print(get_python_lib() + '/pgadmin4/config_local.py')")
Run for the first time the server
python $(python -c "from distutils.sysconfig import get_python_lib; print(get_python_lib() + '/pgadmin4/pgAdmin4.py')")
It should return the following
The configuration database - '/home/myuser/.pgadmin/pgadmin4.db' does not exist. Entering initial setup mode... NOTE: Configuring authentication for DESKTOP mode.
The configuration database has been created at /home/myuser/.pgadmin/pgadmin4.db Starting pgAdmin 4. Please navigate to http://localhost:5050 in your browser.
Open your browser at http://localhost:5050
cd $HOME
source pgadmin4/bin/activate
python $(python -c "from distutils.sysconfig import get_python_lib; print(get_python_lib() + '/pgadmin4/pgAdmin4.py')")
Then, open your browser at http://localhost:5050
Note: you can use above code in a bash file to avoid boring copy&paste