Add A 1-D Numpy Array to DataFrame as a Row

This will work:

df.append(pd.DataFrame(arr).T)

@BalrogOfMoira is that really faster than simply creating the dataframe to append?

df.append(pd.DataFrame(arr.reshape(1,-1), columns=list(df)), ignore_index=True)

Otherwise @Wonton you could simply concatenate arrays then write to a data frame, which could the be appended to the original data frame.