Weired behavior of underscore shortcut

[mikebohdan]

When I created new lambda with _ underscore also mutates to that value:

In [1]: from fn import _

In [2]: _(",")
Out[2]: ','

In [3]: _
Out[3]: ','

Or

In [10]: from fn import _

In [11]: a = _ + 1

In [12]: a
Out[12]: (_ + 1)

In [13]: _
Out[13]: (_ + 1)

In [14]: a(1)
Out[14]: 2

In [15]: _
Out[15]: 2

I think '_' shouldn't be affected by calling external functions (like in 2 example) or calling itself.