If, like me, you are shell scripting your installation and want to automate patching nginx.py you can do what I do:
cd ${HOME}/.bench/bench/config; # Got to bench config directory
cp nginx.py nginx_BACKUP.py; # Back up your config file
# Set variables
declare PATTERN="isinstance(domain, unicode)";
declare REPLACEMENT="\t\t\t\tif isinstance(domain, str) or isinstance(domain, bytes):";
#
cat nginx.py | grep "isinstance"; # Get a 'before' view
sed -i "/${PATTERN}/c\\${REPLACEMENT}" nginx.py; # Do the replacement
cat nginx.py | grep "isinstance"; # Get an 'after' view
You ought to see the following:
erpnext@mine:~$ cd ${HOME}/.bench/bench/config;
erpnext@mine:~/.bench/bench/config$ cp nginx.py nginx_BACKUP.py;
erpnext@mine:~/.bench/bench/config$ declare PATTERN="isinstance(domain, unicode)";
erpnext@mine:~/.bench/bench/config$ declare REPLACEMENT=" if isinstance(domain, str) or isinstance(domain, bytes):";
erpnext@mine:~/.bench/bench/config$ cat nginx.py | grep "isinstance";
if isinstance(domain, str) or isinstance(domain, unicode):
erpnext@mine:~/.bench/bench/config$ sed -i "/${PATTERN}/c\ ${REPLACEMENT}" nginx.py;
erpnext@mine:~/.bench/bench/config$ cat nginx.py | grep "isinstance";
if isinstance(domain, str) or isinstance(domain, bytes):
erpnext@mine:~/.bench/bench/config$
btw – Kudos goes to @Vinob_chander_Ramasw for solving the original issue!!