kosiew commented on PR #1221:
URL:
https://github.com/apache/datafusion-python/pull/1221#issuecomment-3249672632
hi @HeWhoHeWho
Yes. Comparisons and arithmetic on an Expr automatically coerce plain Python
values to literals, so you can write:
```python
df.filter(col("A") > 123)
df.filter(col("B") == "Jack")
```
without explicitly wrapping 123 or "Jack" in lit()/literal().
Internally, each operator checks whether the right‑hand side is already an
Expr; if not, it calls Expr.literal to convert the value before performing the
operation
https://github.com/kosiew/datafusion-python/blob/col-1214a/python/datafusion/expr.py#L467-L501
Consequently, lit() and literal() remain available but are optional for
simple constants.
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