Forgot to add this file in last commit

uncompyle6/util.py

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+# Python repr() for complex numbers, and a little broken for floats.
+# Until such time it is fixed, we'll do a better.
+# More could be done here though.
+
+from math import copysign
+
+def is_negative_zero(n):
+    """Returns true if n is -0.0"""
+    return n == 0.0 and copysign(1, n) == -1
+
+def better_repr(v):
+    """Work around Python's unorthogonal and unhelpful repr() for primitive float
+    and complex."""
+    if isinstance(v, float):
+        # float values 'nan' and 'inf' are not directly
+        # representable in Python before Python 3.5. In Python 3.5
+        # it is accessible via a library constant math.inf.  We
+        # will canonicalize representation of these value as
+        # float('nan') and float('inf')
+        if str(v) in frozenset(["nan", "-nan", "inf", "-inf"]):
+            return "float('%s')" % v
+        elif is_negative_zero(v):
+            return "-0.0"
+        return repr(v)
+    elif isinstance(v, complex):
+        real = better_repr(v.real)
+        imag = better_repr(v.imag)
+        # FIXME: we could probably use repr() in most cases
+        # sort out when that's possible.
+        # The below is however round-tripable, and Python's repr() isn't.
+        return "complex(%s, %s)" % (real, imag)
+    elif isinstance(v, tuple):
+        return "(%s)" % ", ".join(better_repr(i) for i in v)
+    elif isinstance(v, list):
+        return "[%s]" % ", ".join(better_repr(i) for i in v)
+    # TODO: elif deal with sets and dicts
+    else:
+        return repr(v)