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read_hdf does not close store when raise KeyError #25766

xmduhan opened this issue Mar 18, 2019 · 1 comment


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commented Mar 18, 2019

Code Sample, a copy-pastable example if possible

import pandas as pd
df = pd.DataFrame({'a': range(10), 'b': range(10)})

df.to_hdf('/tmp/1.hdf', 'k1')
    pd.read_hdf('/tmp/1.hdf', 'k2')
except Exception as e:
df.to_hdf('/tmp/1.hdf', 'k2')

Problem description

<type 'exceptions.KeyError'>
'No object named k2 in the file'

The file '/tmp/1.hdf' is already opened, but in read-only mode. Please close it before reopening in append mode.

Expected Output

should not raise Exception when: df.to_hdf('/tmp/1.hdf', 'k2')

pandas/io/ line 408

 except (ValueError, TypeError):  # should also catch KeyError 

Output of pd.show_versions()


commit: None
python-bits: 64
OS: Linux
OS-release: 4.4.0-141-generic
machine: x86_64
processor: x86_64
byteorder: little
LC_ALL: None
LOCALE: None.None

pandas: 0.24.2
pytest: 3.2.4
pip: 19.0.1
setuptools: 39.1.0
Cython: 0.27.3
numpy: 1.14.5
scipy: 1.1.0
pyarrow: None
xarray: None
IPython: 5.5.0
sphinx: 1.6.5
patsy: 0.4.1
dateutil: 2.6.1
pytz: 2017.3
blosc: None
bottleneck: None
tables: 3.4.2
numexpr: 2.6.4
feather: None
matplotlib: 2.1.0
openpyxl: 2.4.9
xlrd: 1.1.0
xlwt: 1.3.0
xlsxwriter: 1.0.2
lxml.etree: 4.1.1
bs4: 4.6.0
html5lib: 0.9999999
sqlalchemy: 1.1.15
pymysql: None
psycopg2: (dt dec pq3 ext lo64)
jinja2: 2.10
s3fs: None
fastparquet: None
pandas_gbq: None
pandas_datareader: None
gcsfs: None


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commented Mar 19, 2019

Thanks for the report! PRs are always welcome

@xmduhan xmduhan changed the title read_hdf does not close stone when raise KeyError read_hdf does not close store when raise KeyError Mar 19, 2019

@rbenes rbenes referenced this issue Mar 24, 2019
4 of 4 tasks complete

@jreback jreback added this to the 0.25.0 milestone Mar 30, 2019

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