Python 3 issues

[cclauss]

flake8 testing of https://github.com/norvig/pytudes on Python 3.7.0

$ flake8 . --count --select=E901,E999,F821,F822,F823 --show-source --statistics

./py/testaccum.py:21:21: E999 SyntaxError: invalid syntax
    print acc_display
                    ^
./py/py2html.py:79:12: F821 undefined name 'cmp'
    return cmp(num(x[0]), num(y[0]))
           ^
./py/lispy.py:119:26: E999 SyntaxError: invalid syntax
            print '%s: %s' % (type(e).__name__, e)
                         ^
./py/pal.py:130:22: E999 SyntaxError: invalid syntax
            print self.best
                     ^
./py/lispytest.py:106:19: E999 SyntaxError: invalid syntax
            print x, '=>', to_string(result)
                  ^
./py/ibol.py:78:47: E999 SyntaxError: invalid syntax
    print "Number of genomes: %d (%d distinct)" % (len(genomes), len(set(genomes)))
                                              ^
./py/docex.py:101:16: E999 TabError: inconsistent use of tabs and spaces in indentation
	if self.failed:
               ^
./py/lettercount.py:64:49: E999 SyntaxError: invalid syntax
        print '%s: %s %s words (%s tokens) at %s' % (
                                                ^
./py/parse.py:29:19: E999 TabError: inconsistent use of tabs and spaces in indentation
		rhs = mklist(rhs)
                  ^
./py/ngrams.py:30:28: E999 SyntaxError: invalid syntax
    print 'Running tests...'
                           ^
./py/pal2.py:188:37: E999 SyntaxError: invalid syntax
        print 'using reversibles ...'
                                    ^
./py/lis.py:98:26: F821 undefined name 'raw_input'
        val = eval(parse(raw_input(prompt)))
                         ^
./py/yaptu.py:76:49: E999 SyntaxError: invalid syntax
            if self.verbose: print '=== eval{%s}' % expr,
                                                ^
11    E999 TabError: inconsistent use of tabs and spaces in indentation
2     F821 undefined name 'raw_input'
13

[norvig]

Yes, I should update everything to Python 3.