pandas.Series and Python's built-in type
list can be converted to each other.
This article describes the following contents.
- Fors how to create a
pandas.DataFramefrom a list of labels and multiple values.
The list can be decomposed as in the above example of
pandas.Series, but it is easier to set the
set_index()method after reading the whole list.
If the data type
dtypeis different for each column as in this example, the optimal
dtypefor each column is automatically selected.
If the original list also contains column names, specify the first line as
columnsand the second and subsequent lines as the first argument.
Convert pandas.DataFrame, pandas.Series to list
Convert data to list
Since there is no method to convert
list, first get the NumPy array
valuesattribute, and then use
tolist()method to convert to
valuesattribute does not include labels (row / column names).
Convert data and label (row / column name) to list
If you want to keep the label as list data, reset the
Since there is no method to reset
columns, if you want to keep both the row name and column name of
pandas.DataFrameas list data, after applying the
reset_index()method, transpose it with
.T, apply the
reset_index()method again, and then restore it with
Convert labels (row / column names) to list
If you want to convert only the label into
indexattribute is of the
RangeIndextype in the case of the default sequence number) and has a
pandas.DataFrame, use the
indexattribute for row labels and the
columnsattribute for column labels. Both are of
Indextype can be used as it is in
for, and the element can be obtained by specifying the position with
. In many cases, there is no need to convert it to
You can also use slices, but you can't change elements.
rename ()if you want to change the
- Fors how to create a
Pandas To List Of Dictionaries
- Pandas library in Python easily let you find the unique values. In this tutorial, we will see examples of getting unique values of a column using two Pandas functions. We will first use Pandas unique function to get unique values of a column and then use Pandas dropduplicates function to get unique values of a column.
- So if we need to convert a column to a list, we can use the tolist method in the Series. Tolist converts the Series of pandas data-frame to a list. In the code below, df 'DOB' returns the Series, or the column, with the name as DOB from the DataFrame. The tolist method converts the Series to a list.
Pandas Dataframe To List
For data-only list By passing a list type object to the first argument of each constructor pandas.DataFrame and pandas.Series , pandas.DataFrame and pandas.Series are generated based on the list. An example of generating pandas.Series from a one-dimensional list is as follows. You can also specify a label with the parameter index.