Difference between "raise" and "raise e"?
<p>In python, is there a difference between <code>raise</code> and <code>raise e</code> in an except block?</p>

<p><code>dis</code> is showing me different results, but I don't know what it means.</p>

<p>What's the end behavior of both?</p>

<pre><code>import dis
def a():
    try:
        raise Exception()
    except Exception as e:
        raise


def b():
    try:
        raise Exception()
    except Exception as e:
        raise e

dis.dis(a)
# OUT:   4           0 SETUP_EXCEPT            13 (to 16)
# OUT:   5           3 LOAD_GLOBAL              0 (Exception)
# OUT:               6 CALL_FUNCTION            0
# OUT:               9 RAISE_VARARGS            1
# OUT:              12 POP_BLOCK           
# OUT:              13 JUMP_FORWARD            22 (to 38)
# OUT:   6     &gt;&gt;   16 DUP_TOP             
# OUT:              17 LOAD_GLOBAL              0 (Exception)
# OUT:              20 COMPARE_OP              10 (exception match)
# OUT:              23 POP_JUMP_IF_FALSE       37
# OUT:              26 POP_TOP             
# OUT:              27 STORE_FAST               0 (e)
# OUT:              30 POP_TOP             
# OUT:   7          31 RAISE_VARARGS            0
# OUT:              34 JUMP_FORWARD             1 (to 38)
# OUT:         &gt;&gt;   37 END_FINALLY         
# OUT:         &gt;&gt;   38 LOAD_CONST               0 (None)
# OUT:              41 RETURN_VALUE        
dis.dis(b)
# OUT:   4           0 SETUP_EXCEPT            13 (to 16)
# OUT:   5           3 LOAD_GLOBAL              0 (Exception)
# OUT:               6 CALL_FUNCTION            0
# OUT:               9 RAISE_VARARGS            1
# OUT:              12 POP_BLOCK           
# OUT:              13 JUMP_FORWARD            25 (to 41)
# OUT:   6     &gt;&gt;   16 DUP_TOP             
# OUT:              17 LOAD_GLOBAL              0 (Exception)
# OUT:              20 COMPARE_OP              10 (exception match)
# OUT:              23 POP_JUMP_IF_FALSE       40
# OUT:              26 POP_TOP             
# OUT:              27 STORE_FAST               0 (e)
# OUT:              30 POP_TOP             
# OUT:   7          31 LOAD_FAST                0 (e)
# OUT:              34 RAISE_VARARGS            1
# OUT:              37 JUMP_FORWARD             1 (to 41)
# OUT:         &gt;&gt;   40 END_FINALLY         
# OUT:         &gt;&gt;   41 LOAD_CONST               0 (None)
# OUT:              44 RETURN_VALUE        
</code></pre>