Python pandas: fill a dataframe row by row
df['y'] will set a column
since you want to set a row, use .loc
Note that .ix is equivalent here, yours failed because you tried to assign a dictionaryto each element of the row y probably not what you want; converting to a Series tells pandasthat you want to align the input (for example you then don't have to to specify all of the elements)
In [6]: import pandas as pdIn [7]: df = pd.DataFrame(columns=['a','b','c','d'], index=['x','y','z'])In [8]: df.loc['y'] = pd.Series({'a':1, 'b':5, 'c':2, 'd':3})In [9]: dfOut[9]: a b c dx NaN NaN NaN NaNy 1 5 2 3z NaN NaN NaN NaN