Cannot launch under Linux Mint 19 - invalid syntax error

[catthou]

I've followed the instructions to install pyqt and pygame under linux mint 19 but I'm getting this error trying to run:

$ python2 ./pesterchum.py 
WARNING:root:Couldn't load attrdict from new loc; falling back
.py
.lua
Registered quirks: upper(), lower(), reverse(), scramble()
(upper\(|lower\(|reverse\(|scramble\(|\)|\\[0-9]+)
Traceback (most recent call last):
  File "./pesterchum.py", line 120, in <module>
    from updatecheck import MSPAChecker
  File "/home/haruka/.sys/apps/pesterchum/updatecheck.py", line 6, in <module>
    from libs import feedparser
  File "/home/haruka/.sys/apps/pesterchum/libs/feedparser.py", line 69, in <module>
    import sgmllib, re, sys, copy, urlparse, time, rfc822, types, cgi, urllib, urllib2
  File "/home/haruka/.sys/apps/pesterchum/libs/sgmllib.py", line 484
    print('start tag: <' + tag, end=' ')
                                   ^
SyntaxError: invalid syntax

I have not had problems running on past versions of Linux Mint, although I don't think I used pesterchum at all under Linux Mint 18, 18.1, or 18.2