如何在不使用列名的情况下将列表追加到数据框？

Question

I want to append a list of 4 prices [1,2,3,4] to an already existing dataframe using the dataframe.append() method, the already existing dataframe has four columns.

using this

dataframe = pd.DataFrame(columns=["open", "high", "low", "close"], data = [[1,2,3,4]])

creates the dataframe

   open  high  low  close
0     1     2    3      4

then i want to append some lists like this:

dataframe = dataframe.append([[5,6,7,8]], ignore_index =True)

gives the output

   open  high  low  close    0    1    2    3
0   1.0   2.0  3.0    4.0  NaN  NaN  NaN  NaN
1   NaN   NaN  NaN    NaN  5.0  6.0  7.0  8.0

while I want the list to be appended in continuation to the dataframe, is there a way to do this without using the column names, only the list of four prices?

Answer 1

你可以做类似的事情

df.loc[len(df)] = [1, 2, 3, 4]

Answer 2

if you will be adding more than one row, you should use the concat function. Which will require you to add the new data in a DataFrame first.

df3 = pd.concat([df1, df2], ignore_index=True)

Read more in the docs here .