import pandas as pd
df1 = pd.DataFrame()
list1 = [1,2,3,4,5]
df2 = pd.DataFrame(list1)
test_df=pd.DataFrame({'name':['张三','李四','王五','张三','李四','王五','张三','六六'],
                     'level':[10,3,8,14,2,3,18,2],
                      'info':['吵闹','安静','中等','吵闹','安静','安静','吵闹','闲散'],
                      'change_times':[1,2,3,1,2,4,9,12]
                     })
print(df1.append(df2))
temp = df1.append(df2)
df3 = pd.DataFrame([7,8,9,8,8])
print(temp.append(df3))
print(df1.append(test_df))