Pandas Practice Set-1: Rename all the columns of the diamonds Dataframe

Last update on May 28 2022 13:38:35 (UTC/GMT +8 hours)

Pandas Practice Set-1: Exercise-8 with Solution

Write a Pandas program to rename all the columns of the diamonds Dataframe.

Sample Solution :

Python Code :

import pandas as pd
diamonds = pd.read_csv('https://raw.githubusercontent.com/mwaskom/seaborn-data/master/diamonds.csv') 
print("Original Dataframe:")
print(diamonds.head())
diamonds_cols = ['new_carat', 'new_cut', 'new_color', 'new_clarity', 'new_depth', 'new_table', 'new_price', 'new_x', 'new_y', 'new_z']
diamonds.columns = diamonds_cols
print("\nAfter renaming all the columns of the said dataframe:")
diamonds.rename(columns={'color':'diamond_color', 'clarity':'dimaond_clarity'}, inplace=True)
print(diamonds.head())

Sample Output:

Original Dataframe:
   carat      cut color clarity  depth  table  price     x     y     z
0   0.23    Ideal     E     SI2   61.5   55.0    326  3.95  3.98  2.43
1   0.21  Premium     E     SI1   59.8   61.0    326  3.89  3.84  2.31
2   0.23     Good     E     VS1   56.9   65.0    327  4.05  4.07  2.31
3   0.29  Premium     I     VS2   62.4   58.0    334  4.20  4.23  2.63
4   0.31     Good     J     SI2   63.3   58.0    335  4.34  4.35  2.75

After renaming all the columns of the said dataframe:
   new_carat  new_cut new_color  ...   new_x  new_y  new_z
0       0.23    Ideal         E  ...    3.95   3.98   2.43
1       0.21  Premium         E  ...    3.89   3.84   2.31
2       0.23     Good         E  ...    4.05   4.07   2.31
3       0.29  Premium         I  ...    4.20   4.23   2.63
4       0.31     Good         J  ...    4.34   4.35   2.75

[5 rows x 10 columns]

Python Code Editor:

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Previous: Write a pandas program to rename two of the columns of the diamonds Dataframe.
Next: Write a pandas program to remove the second column of the diamonds Dataframe.

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Python: Tips of the Day

Find current directory and file's directory:

To get the full path to the directory a Python file is contained in, write this in that file:

import os 
dir_path = os.path.dirname(os.path.realpath(__file__))

(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)

To get the current working directory use

import os
cwd = os.getcwd()

Documentation references for the modules, constants and functions used above:

The os and os.path modules.
The __file__ constant
os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
os.path.dirname(path) (returns "the directory name of pathname path")
os.getcwd() (returns "a string representing the current working directory")
os.chdir(path) ("change the current working directory to path")

Ref: https://bit.ly/3fy0R6m