import pandas as pd # data manipulation and analysis

data1 = [['Alex',10],['Alex',12],['Clarke',13]]
df1 = pd.DataFrame(data1,columns=['Name','Age'])

data2 = [['Alex',10],['Alex',12],['Clarke',13]]
df2 = pd.DataFrame(data2,columns=['Name','Age'])

frames_list = [df1,df2]

for df in frames_list:
    df = df = + "_v1" # trying to append "_v1" to the existing name of the dataframe