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How can I iterate over rows in a Pandas DataFrame? I have a pandas dataframe, df: c1 c2 0 10 100 1 11 110 2 12 120 How do I iterate over the rows of this dataframe? For every row, I want to access its elements (values in cells) by the n
python - Renaming column names in Pandas - Stack Overflow To focus on the need to rename of replace column names with a pre-existing list, I'll create a new sample dataframe df with initial column names and unrelated new column names
How to get set a pandas index column title or name? To just get the index column names df index names will work for both a single Index or MultiIndex as of the most recent version of pandas As someone who found this while trying to find the best way to get a list of index names + column names, I would have found this answer useful:
python - df. drop if it exists - Stack Overflow df = df drop([x for x in candidates if x in df columns], axis=) It has the benefit of readability and (with a small tweak to the code) the ability to record exactly which columns existed were dropped when
How to sort pandas dataframe by one column - Stack Overflow If you want to sort by two columns, pass a list of column labels to sort_values with the column labels ordered according to sort priority If you use df sort_values(['2', '0']), the result would be sorted by column 2 then column 0 Granted, this does not really make sense for this example because each value in df['2'] is unique
python - How to check if particular value (in cell) is NaN in pandas . . . >>> df iloc[1,0] nan So, why is the second option not working? Is it possible to check for NaN values using iloc? Editor's note: This question previously used pd np instead of np and ix in addition to iloc, but since these no longer exist, they have been edited out to keep it short and clear
Why do df and du commands show different disk usage? 15 Ok, lets check the man pages: df - report file system disk space usage and du - estimate file space usage Those two tools were meant for different propose While df is to show the file system usage, du is to report the file space usage du works from files while df works at filesystem level, reporting what the kernel says it has available