Получить первые n записей фрейма данных Pandas
Let us see how to fetch the first n records of a Pandas DataFrame. Lets first make a dataframe :
# Import Required Libraryimport pandas as pd # Create a dictionary for the dataframedict = {"Name" : ["Sumit Tyagi", "Sukritin", "Akriti Goel", "Sanskriti", "Abhishek Jain"], "Age":[22, 20, 45, 21, 22], "Marks":[90, 84, 33, 87, 82]} # Converting Dictionary to Pandas Dataframedf = pd.DataFrame(dict) # Print Dataframeprint(df) |
Output :
Method 1 : Using head() method. Use pandas.DataFrame.head(n) to get the first n rows of the DataFrame. It takes one optional argument n (number of rows you want to get from the start). By default n = 5, it return first 5 rows if value of n is not passed to the method.
# Getting first 3 rows from dfdf_first_3 = df.head(3) # Printing df_first_3print(df_first_3) |
Output :
Method 2 : Using pandas.DataFrame.iloc(). Use pandas.DataFrame.iloc() to get the first n rows. It is similar to the list slicing.
# Getting first 3 rows from dfdf_first_3 = df.iloc[:3] # Printing df_first_3print(df_first_3) |
Output :
Method 3 : Display first n records of specific columns
# Getting first 2 rows of columns Age and Marks from dfdf_first_2 = df[["Age", "Marks"]].head(2) # Printing df_first_2print(df_first_2) |
Output :
Method 4 : Display first n records from last n columns. Display first n records for the last n columns using pandas.DataFrame.iloc()
# Getting first n rows and last n columns from dfdf_first_2_row_last_2_col = df.iloc[:2, -2:] # Printing df_first_2_row_last_2_colprint(df_first_2_row_last_2_col) |
Output :
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