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Fixed date_range to change dtype resolution #59055

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Fixed date_range to change dtype resolution #59055

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ef98122
Change link from NEP 29 to SPEC 0 for Numpy Guidelines
tilovashahrin Jun 14, 2024
bc89591
Update doc/source/development/policies.rst
tilovashahrin Jun 14, 2024
44f1df0
Merge branch 'pandas-dev:main' into main
tilovashahrin Jun 16, 2024
339a554
Merge branch 'pandas-dev:main' into main
tilovashahrin Jun 19, 2024
9cf4b28
Infer the unit based on the frequency
tilovashahrin Jun 19, 2024
3b2e453
Additional tests for date_range inferred resolution
tilovashahrin Jun 19, 2024
799ca3e
Update test_inference.py
tilovashahrin Jun 20, 2024
e87c345
Update test_inference.py
tilovashahrin Jun 20, 2024
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8 changes: 8 additions & 0 deletions pandas/core/indexes/datetimes.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1003,6 +1003,14 @@ def date_range(
"""
if freq is None and com.any_none(periods, start, end):
freq = "D"

if unit is None and freq is not None:
offset = to_offset(freq)
if offset is not None:
unit = offset.n

if unit is None:
unit = 'ns'

dtarr = DatetimeArray._generate_range(
start=start,
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