test_parser
Expressions:
expr: foo(1)
expr: [1, 2, 3]
expr: [x**3 for x in range(20)]
expr: [x**3 for x in range(20) if x % 3]
expr: foo(*args)
expr: foo(*args, **kw)
expr: foo(**kw)
expr: foo(key=value)
expr: foo(key=value, *args)
expr: foo(key=value, *args, **kw)
expr: foo(key=value, **kw)
expr: foo(a, b, c, *args)
expr: foo(a, b, c, *args, **kw)
expr: foo(a, b, c, **kw)
expr: foo + bar

Statements:
suite: print
suite: print 1
suite: print 1,
suite: print >>fp
suite: print >>fp, 1
suite: print >>fp, 1,
suite: a
suite: a = b
suite: a = b = c = d = e
suite: a += b
suite: a -= b
suite: a *= b
suite: a /= b
suite: a %= b
suite: a &= b
suite: a |= b
suite: a ^= b
suite: a <<= b
suite: a >>= b
suite: a **= b

Invalid parse trees:

<junk>
caught expected exception for invalid tree

print >>fp,
caught expected exception for invalid tree

a,,c
caught expected exception for invalid tree

a $= b
caught expected exception for invalid tree
