Github user davies commented on a diff in the pull request:
https://github.com/apache/spark/pull/10062#discussion_r46318393
--- Diff: python/pyspark/sql/column.py ---
@@ -183,13 +183,33 @@ def __init__(self, jc):
# container operators
__contains__ = _bin_op("contains")
- __getitem__ = _bin_op("apply")
# bitwise operators
bitwiseOR = _bin_op("bitwiseOR")
bitwiseAND = _bin_op("bitwiseAND")
bitwiseXOR = _bin_op("bitwiseXOR")
+ def __getitem__(self, key):
+ if isinstance(key, slice):
+ if key.step is not None and key.step != 1:
+ raise ValueError("PySpark doesn't support slice with step")
+ if key.start is not None and key.stop is not None:
+ # str[i:j]
+ return self.substr(key.start, key.stop - key.start)
--- End diff --
The start of slice is zero based, but startPos of substr is one based, it's
confusing between these two, so I'd like to not support slice.
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