IPython debugger (IPdb) now supports the number of context lines for the where (and w) commands. The context keyword is also available in various APIs.

In [2]: def foo():
...:     1
...:     2
...:     3
...:     4
...:     5
...:     raise ValueError('6 is not acceptable')
...:     7
...:     8
...:     9
...:     10
...:

In [3]: foo()
----------------------------------------------------
ValueError         Traceback (most recent call last)
<ipython-input-3> in <module>()
----> 1 foo()

<ipython-input-2> in foo()
    5     4
    6     5
----> 7     raise ValueError('6 is not acceptable')
    8     7
    9     8

ValueError: 6 is not acceptable

In [4]: debug
> <ipython-input-2>(7)foo()
    5     4
    6     5
----> 7     raise ValueError('6 is not acceptable')
    8     7
    9     8

ipdb> where 1
<ipython-input-3>(1)<module>()
----> 1 foo()

> <ipython-input-2>(7)foo()
----> 7     raise ValueError('6 is not acceptable')