如何在熊猫python的数据框中插入行？

Question

I'm very new to pandas and dataframes.

I have two lists in python which contains columns and values that needs to be inserted for that columns in a row.

For Ex:

col_list = ['column1', 'column3', 'column4', 'column6', ...]
val_list = ['value1', 'value3', 'value4', 'value6', ...]

How can I insert these values from val_list in columns in col_list for a specific row.

And I need to iterate multiple times.

These value and column list will change for every iteration but the order of column1 - value1, column2 - value2 doesn't change.

If the ith element in col_list is col-i , then ith element in val_list will be val-i .

How can I enter data in only specific columns that are in col_list into pandas dataframe.

Answer 1

my_pd = pd.DataFrame(np.array(val_list)).T
my_pd.columns = col_list
pd.concat([a, my_pd], ignore_index=True)

I don't really see this in other answers, but here is a way to use concat to join your list to the end of the pandas dataframe . It's tricky though, usually it's best to iterate through all the list you want to join, create a new DataFrame off that and then joining those 2 df together, it will be much easier and faster.