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Fix the unstacking when data contains duplicated rows with the same index #850

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Fix the unstacking when data contains duplicated rows with the same index #850

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5fa28a8
Deduplicate rows with the same index
changlan Feb 16, 2021
87bc3f8
reformat by black
changlan Feb 16, 2021
1a551dc
Update change log
changlan Feb 16, 2021
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6 changes: 4 additions & 2 deletions docs/source/whatsnew/v0.9.1.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -20,13 +20,15 @@ Enhancements
from every trading board (ver. 0.9.0 behaviour)
- Docs for MOEX reedited

.. _whatsnew_080.bug_fixes:
.. _whatsnew_091.bug_fixes:

Bug Fixes
~~~~~~~~~

- Fixed broken links on the github ussies on "What’s New" docs pages
- Deduplicate rows with the same index (:issue:`610`) (:issue:`738`)

Contributors
~~~~~~~~~~~~
- Dmitry Alekseev
- Dmitry Alekseev
- Chang Lan
7 changes: 5 additions & 2 deletions pandas_datareader/base.py
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Expand Up @@ -139,7 +139,7 @@ def _sanitize_response(response):
return response.content

def _get_response(self, url, params=None, headers=None):
""" send raw HTTP request to get requests.Response from the specified url
"""send raw HTTP request to get requests.Response from the specified url
Parameters
----------
url : str
Expand Down Expand Up @@ -265,7 +265,10 @@ def _dl_mult_symbols(self, symbols):
for sym_group in _in_chunks(symbols, self.chunksize):
for sym in sym_group:
try:
stocks[sym] = self._read_one_data(self.url, self._get_params(sym))
df = self._read_one_data(self.url, self._get_params(sym))
# Keep the last item if there are duplicated rows with the same index.
df = df[~df.index.duplicated(keep="last")]
stocks[sym] = df
passed.append(sym)
except (IOError, KeyError):
msg = "Failed to read symbol: {0!r}, replacing with NaN."
Expand Down