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feat: improve error message in Series.apply for direct udfs #1673

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Merged
merged 7 commits into from
May 7, 2025
Merged

feat: improve error message in Series.apply for direct udfs #1673

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7d6909d
feat: improve error message in `Series.apply` for direct udfs
shobsi Apr 30, 2025
3d7f697
remove stray file, improve message
shobsi Apr 30, 2025
374900e
specify namespace for udf and remote_function in the error message
shobsi May 1, 2025
a1c288b
Merge remote-tracking branch 'refs/remotes/github/main' into shobs-df…
shobsi May 1, 2025
2fb54ec
Merge remote-tracking branch 'refs/remotes/github/main' into shobs-df…
shobsi May 2, 2025
6a6aaa2
Merge remote-tracking branch 'refs/remotes/github/main' into shobs-df…
shobsi May 7, 2025
b808ec6
fix typo
shobsi May 7, 2025
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15 changes: 12 additions & 3 deletions bigframes/series.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1712,9 +1712,18 @@ def apply(
# as a whole.
if by_row:
raise ValueError(
"A vectorized non-BigFrames BigQuery function can be "
"provided only with by_row=False. For element-wise operation "
"it must be a BigFrames BigQuery function."
"You have passed a function as-is. If your intention is to "
"apply this function in a vectorized way (i.e. to the "
"entire Series as a whole, and you are sure that it "
"performs only the operations that are implemented for a "
"Series (e.g. a chain of arithmetic/logical operations, "
"such as `def foo(s): return s % 2 == 1`), please also "
"specify `by_row=False`. If your function contains "
"arbitrary code, it can only be applied to every element "
"in the Series individually, in which case you must "
"convert it to a BigFrames BigQuery function using "
"`bigframes.pandas.udf`, "
"or `bigframes.pandas.remote_function` before passing."
)

try:
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