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BUG: Series[td64].astype("string").astype("timedelta64[ns]") raises #38509

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jbrockmendel opened this issue Dec 15, 2020 · 1 comment
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BUG: Series[td64].astype("string").astype("timedelta64[ns]") raises #38509

jbrockmendel opened this issue Dec 15, 2020 · 1 comment
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Astype Bug Dtype Conversions Unexpected or buggy dtype conversions Strings String extension data type and string data Timedelta Timedelta data type

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@jbrockmendel
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tdi = pd.timedelta_range("1 Day", periods=3)

ser = pd.Series(tdi)

>>> ser.astype("string")
0    1 days
1    2 days
2    3 days
dtype: string

>>> ser.astype("string").astype(ser.dtype)
[...]
ValueError: Could not convert object to NumPy timedelta

We have a round-trip test for string -> dt64 in test_astype_roundtrip, should amend that to do td64 when this is fixed
@jbrockmendel jbrockmendel added Bug Needs Triage Issue that has not been reviewed by a pandas team member labels Dec 15, 2020
@simonjayhawkins simonjayhawkins added Strings String extension data type and string data Timedelta Timedelta data type and removed Needs Triage Issue that has not been reviewed by a pandas team member labels Dec 15, 2020
@ellequelle ellequelle mentioned this issue Dec 21, 2020
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@DrGFreeman DrGFreeman mentioned this issue Mar 12, 2021
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@siboehm siboehm mentioned this issue Mar 22, 2021
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simonjayhawkins added a commit to simonjayhawkins/pandas that referenced this issue May 10, 2021
@simonjayhawkins
add code sample for pandas-dev#38509
d390d32
@jbrockmendel jbrockmendel mentioned this issue May 10, 2021
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@mroeschke mroeschke added the Dtype Conversions Unexpected or buggy dtype conversions label Aug 14, 2021
@jbrockmendel jbrockmendel mentioned this issue Jul 27, 2023
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@jbrockmendel
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Closed by #53022. i've added a test to my next Assorted branch.

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Astype Bug Dtype Conversions Unexpected or buggy dtype conversions Strings String extension data type and string data Timedelta Timedelta data type
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BUG: fixed string series conversion back to timedelta in td64->string->td64 ellequelle/pandas
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@jbrockmendel @mroeschke @simonjayhawkins