zhengruifeng commented on code in PR #38858:
URL: https://github.com/apache/spark/pull/38858#discussion_r1036701948
##########
python/pyspark/sql/connect/column.py:
##########
@@ -84,7 +85,7 @@ def __init__(self) -> None:
def to_plan(self, session: "SparkConnectClient") -> "proto.Expression":
...
- def __str__(self) -> str:
+ def __repr__(self) -> str:
Review Comment:
a simple example for why we should use `__repr__`:
```
In [20]: class A:
...: def __str__(self) -> str:
...: return "123"
...:
In [21]: a = A()
In [22]: a
Out[22]: <__main__.A at 0x1034bef40>
In [23]: str(a)
Out[23]: '123'
In [24]: repr(a)
Out[24]: '<__main__.A object at 0x1034bef40>'
In [30]: class A:
...: def __repr__(self) -> str:
...: return "123"
...:
In [31]: a = A()
In [32]: a
Out[32]: 123
In [33]: str(a)
Out[33]: '123'
In [34]: repr(a)
Out[34]: '123'
In [35]: class A:
...: def __str__(self) -> str:
...: return "123"
...: def __repr__(self) -> str:
...: return "xyz"
...:
In [36]: a = A()
In [37]: a
Out[37]: xyz
In [38]: str(a)
Out[38]: '123'
In [39]: repr(a)
Out[39]: 'xyz'
```
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