atherkevin commented on issue #15133:
URL: https://github.com/apache/arrow/issues/15133#issuecomment-1372487119
The missing key! Thank you!
On Thu, Jan 5, 2023 at 9:58 AM Alenka Frim ***@***.***> wrote:
> Oh sorry, didn't check myself to be sure.
> Changing the type on the pandas side should work, like so:
>
> import pyarrow as paimport pandas as pd
> df = pd.DataFrame(({
> 'a': ['a', 'a', 'a', 'b', 'b', 'b', 'c'],
> 'b': [1, 2, None, 4, 5, 1, 0],
> 'c': [1.5, 2.0, 3.5, 5.0, 8.0, 10.0, 'a string'],
> }))df['c'] = df['c'].astype('str')
> pa.Table.from_pandas(df)# pyarrow.Table# a: string# b: double# c: string#
----# a: [["a","a","a","b","b","b","c"]]# b: [[1,2,null,4,5,1,0]]# c:
[["1.5","2.0","3.5","5.0","8.0","10.0","a string"]]
> df.to_feather('file')pd.read_feather('file')# a b c# 0 a
1.0 1.5# 1 a 2.0 2.0# 2 a NaN 3.5# 3 b 4.0 5.0# 4
b 5.0 8.0# 5 b 1.0 10.0# 6 c 0.0 a string
>
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