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PERF: _return_parsed_timezone_results #50168

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Merged
MarcoGorelli merged 4 commits into from
Dec 10, 2022
Merged

PERF: _return_parsed_timezone_results #50168

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45f65bc
PERF: _return_parsed_timezone_results
lukemanley Dec 10, 2022
82acdd4
whatsnew
lukemanley Dec 10, 2022
c58daa6
fix
lukemanley Dec 10, 2022
ccbb71e
whatsnew
lukemanley Dec 10, 2022
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PERF: _return_parsed_timezone_results
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@lukemanley
lukemanley committed Dec 10, 2022
commit 45f65bc65798629cc7c35e4866a3913f911585a1
24 changes: 11 additions & 13 deletions pandas/core/tools/datetimes.py
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Original file line number Diff line number Diff line change
Expand Up @@ -313,19 +313,17 @@ def _return_parsed_timezone_results(
-------
tz_result : Index-like of parsed dates with timezone
"""
tz_results = np.array(
[Timestamp(res).tz_localize(zone) for res, zone in zip(result, timezones)]
)
if utc:
# Convert to the same tz
tz_results = np.array(
[
tz_result.tz_convert("utc")
if tz_result.tzinfo is not None
else tz_result.tz_localize("utc")
for tz_result in tz_results
]
)
dta = DatetimeArray(result)
tz_results = np.empty(len(dta), dtype=object)
for zone in unique(timezones):
mask = timezones == zone
dta = DatetimeArray(result[mask]).tz_localize(zone)
if utc:
if dta.tzinfo is None:
dta = dta.tz_localize("utc")
else:
dta = dta.tz_convert("utc")
tz_results[mask] = dta

return Index(tz_results, name=name)

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