python - ValueError when trying to add row to dataframe -


i trying add row df[0] = [0,360, 0, 0, 0,2,3.9,100.01,100,0] dataframe df shown below error valueerror: length of values not match length of index. have no idea why is, there 10 values in row , there 10 columns. 

          dt  months_to_maturity       asset_id            orig_iss_dt  \ 1  2016-02-15                   6  (binary data)  1986-02-18 00:00:00.0    2  2016-08-01                  12  (binary data)  1986-08-01 00:00:00.0    3  2017-02-06                  18  (binary data)  1987-02-06 00:00:00.0                 maturity_dt  pay_freq_cd  coupon  closing_price  face_value  \ 1   2016-02-15 00:00:00.0            2   9.250      105.40625         100    2   2016-08-01 00:00:00.0            2   9.380      105.86200         100    3   2017-02-06 00:00:00.0            2   8.450      111.42610         100                              dt2   1  1970-01-01 00:00:00.000000002   2  1970-01-01 00:00:00.000000002   3  1970-01-01 00:00:00.000000002

thank you

because 

df[0] = ...

is syntax adding column, not row, , should array on right should of same length columns, i.e. number of rows (or scalar). if want add row do

df.loc[0] = <values>

i guess part of confusion comes fact sort of opposite numpy syntax, in sense a[0] = <values> assigns values zeroth row rather column.


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