code: df_t["My address"]=["My address",7,"My city","My State","My Country","My Shop",12,"My Continent"]
ValueError: Length of values (8) does not match length of index (7)
code: df_t["My address"]=["My address",7,"My city","My State","My Country","My Shop",12,"My Continent"]
ValueError: Length of values (8) does not match length of index (7)
Your code tries to add a new column, not a row. If you want to actually add a row to your DataFrame you have several options, one of many being:
df_t.loc[len(df_t)] = ["My address",7,"My city","My State","My Country","My Shop",12,"My Continent"]
However, please notice that growing a DataFrane by adding new rows isn't a best practice (see this very explanatory reference).
Next time please add your sample dataframe directly in the question and not in the comments (you can also edit your question)