# Why is Sage calling 1 a variable?

Consider

```
x = var('x')
f = 1/(x-3)
limit(f,x=3,dir='below')
```

UnboundLocalError: local variable 'l' referenced before assignment

Why is Sage calling 1 a variable?

Consider

```
x = var('x')
f = 1/(x-3)
limit(f,x=3,dir='below')
```

UnboundLocalError: local variable 'l' referenced before assignment

1

Try with `limit(f, x=3, dir='minus')`

.

I think this is a (trivial) bug, thanks for reporting. The code in question is in lines 1228-1245 of `calculus.py`

.

*Edit:* this is #23048.

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Asked: ** 2017-05-22 07:24:03 +0200 **

Seen: **246 times**

Last updated: **May 23 '17**

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I'm using preformat so I have no idea why the first two statements keep showing up on the same line, but they aren't

The error message is

`local variable 'l' referenced before assignment`

. It's variable`l`

(small cap L), not`1`

. I have reported the issue on sage-dev.Thanks for reporting.