sympy/sympy — pull request #1260 by asmeurer (2012-04-25 09:18:55+00:00)
Title: isympy -a no globals

This makes automatic symbols created with isympy -a not be added to the globals dictionary(), keeping it from becoming bloated. For example

*Before*

```py
$ isympy -a
...
In [442]: 'notdefined' in globals()
Out[442]: False

In [443]: notdefined
Out[443]: notdefined

In [444]: 'notdefined' in globals()
Out[444]: True
```

*After*

```py
$ isympy -a
...
In [1]: 'notdefined' in globals()
Out[1]: False

In [2]: notdefined
Out[2]: notdefined

In [3]: 'notdefined' in globals()
Out[3]: False
```

It would be nice if@mattpap had time to look at this, but really anyone can review it.