python/pandas/ValueError: cannot reindex from a duplicate axis.md
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+[python - What does `ValueError: cannot reindex from a duplicate axis` mean? - Stack Overflow](https://stackoverflow.com/questions/27236275/what-does-valueerror-cannot-reindex-from-a-duplicate-axis-mean)
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+```
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+df = df[~df.index.duplicated()]
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+```
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