Engineering mode-based setting: %xmode

[klauer]

Expected Behavior

• When in engineering mode, show full tracebacks
• When in general user mode, show limited tracebacks

Current Behavior

• Show full tracebacks all the time to everyone

Possible Solution

• Engineering mode: %xmode verbose
• User mode: %xmode plain (minimal?)

Context

Related pcdshub/pcdsdevices#591

Example

In [31]: def test(i=0):
    ...:     if i > 5:
    ...:         raise ValueError('this is the exception text')
    ...:     test(i + 1)
    ...:

In [36]: %xmode
Exception reporting mode: Plain

In [37]: test()
Traceback (most recent call last):
  File "<ipython-input-37-fbd55f77ab7c>", line 1, in <module>
    test()
  File "<ipython-input-31-b5ce4b1c52dd>", line 4, in test
    test(i + 1)
  File "<ipython-input-31-b5ce4b1c52dd>", line 4, in test
    test(i + 1)
  File "<ipython-input-31-b5ce4b1c52dd>", line 4, in test
    test(i + 1)
  File "<ipython-input-31-b5ce4b1c52dd>", line 4, in test
    test(i + 1)
  File "<ipython-input-31-b5ce4b1c52dd>", line 4, in test
    test(i + 1)
  File "<ipython-input-31-b5ce4b1c52dd>", line 4, in test
    test(i + 1)
  File "<ipython-input-31-b5ce4b1c52dd>", line 3, in test
    raise ValueError('this is the exception text')
ValueError: this is the exception text


In [38]: %xmode
Exception reporting mode: Context

In [39]: test()
---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-39-fbd55f77ab7c> in <module>
----> 1 test()

<ipython-input-31-b5ce4b1c52dd> in test(i)
      2     if i > 5:
      3         raise ValueError('this is the exception text')
----> 4     test(i + 1)
      5

<ipython-input-31-b5ce4b1c52dd> in test(i)
      2     if i > 5:
      3         raise ValueError('this is the exception text')
----> 4     test(i + 1)
      5

<ipython-input-31-b5ce4b1c52dd> in test(i)
      2     if i > 5:
      3         raise ValueError('this is the exception text')
----> 4     test(i + 1)
      5

<ipython-input-31-b5ce4b1c52dd> in test(i)
      2     if i > 5:
      3         raise ValueError('this is the exception text')
----> 4     test(i + 1)
      5

<ipython-input-31-b5ce4b1c52dd> in test(i)
      2     if i > 5:
      3         raise ValueError('this is the exception text')
----> 4     test(i + 1)
      5

<ipython-input-31-b5ce4b1c52dd> in test(i)
      2     if i > 5:
      3         raise ValueError('this is the exception text')
----> 4     test(i + 1)
      5

<ipython-input-31-b5ce4b1c52dd> in test(i)
      1 def test(i=0):
      2     if i > 5:
----> 3         raise ValueError('this is the exception text')
      4     test(i + 1)
      5

ValueError: this is the exception text

In [40]: %xmode
Exception reporting mode: Verbose

In [41]: test()
---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-41-fbd55f77ab7c> in <module>
----> 1 test()
        global test = <function test at 0x7fba28fc9e18>

<ipython-input-31-b5ce4b1c52dd> in test(i=0)
      2     if i > 5:
      3         raise ValueError('this is the exception text')
----> 4     test(i + 1)
        global test = <function test at 0x7fba28fc9e18>
        i = 0
      5

<ipython-input-31-b5ce4b1c52dd> in test(i=1)
      2     if i > 5:
      3         raise ValueError('this is the exception text')
----> 4     test(i + 1)
        global test = <function test at 0x7fba28fc9e18>
        i = 1
      5

<ipython-input-31-b5ce4b1c52dd> in test(i=2)
      2     if i > 5:
      3         raise ValueError('this is the exception text')
----> 4     test(i + 1)
        global test = <function test at 0x7fba28fc9e18>
        i = 2
      5

<ipython-input-31-b5ce4b1c52dd> in test(i=3)
      2     if i > 5:
      3         raise ValueError('this is the exception text')
----> 4     test(i + 1)
        global test = <function test at 0x7fba28fc9e18>
        i = 3
      5

<ipython-input-31-b5ce4b1c52dd> in test(i=4)
      2     if i > 5:
      3         raise ValueError('this is the exception text')
----> 4     test(i + 1)
        global test = <function test at 0x7fba28fc9e18>
        i = 4
      5

<ipython-input-31-b5ce4b1c52dd> in test(i=5)
      2     if i > 5:
      3         raise ValueError('this is the exception text')
----> 4     test(i + 1)
        global test = <function test at 0x7fba28fc9e18>
        i = 5
      5

<ipython-input-31-b5ce4b1c52dd> in test(i=6)
      1 def test(i=0):
      2     if i > 5:
----> 3         raise ValueError('this is the exception text')
        global ValueError = undefined
      4     test(i + 1)
      5

ValueError: this is the exception text

In [42]: %xmode
Exception reporting mode: Minimal

In [43]: test()
ValueError: this is the exception text