[issue29139] operator.concat/iconcat could only work if left operand is a sequence

[STINNER Victor]

STINNER Victor added the comment:

> More like a implementation detail for me.

IMHO it's a deliberate choice that the operator module behaves
differently for concat() and add().

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue29139>
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