python - Pandas: Fill in missing indexes with specific ordered values that are already in column. -


i have extracted one-column dataframe specific values. dataframe looks like:

           commodity   0              cocoa 4             coffee 6              maize 7               rice 10             sugar 12             wheat

now want respectively fill each index has no value value above in column should this:

            commodity   0               cocoa 1               cocoa 2               cocoa 3               cocoa 4              coffee 5              coffee 6               maize 7                rice 8                rice 9                rice 10              sugar 11              sugar 12              wheat

i don't seem pandas documentation working text data. help!

i create new index pd.rangeindex. works range need pass number 1 greater max number in current index.

df.reindex(pd.rangeindex(df.index.max() + 1)).ffill()     commodity 0      cocoa 1      cocoa 2      cocoa 3      cocoa 4     coffee 5     coffee 6      maize 7       rice 8       rice 9       rice 10     sugar 11     sugar 12     wheat

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