Please note, this is a STATIC archive of website www.w3resource.com from 19 Jul 2022, cach3.com does not collect or store any user information, there is no "phishing" involved.
w3resource

Pandas: Divide a DataFrame in a given ratio

Pandas: DataFrame Exercise-38 with Solution

Write a Pandas program to divide a DataFrame in a given ratio.

Sample data:
Original DataFrame:
0 1
0 0.316147 -0.767359
1 -0.813410 -2.522672
2 0.869615 1.194704
3 -0.892915 -0.055133
4 -0.341126 0.518266
5 1.857342 1.361229
6 -0.044353 -1.205002
7 -0.726346 -0.535147
8 -1.350726 0.563117
9 1.051666 -0.441533
70% of the said DataFrame:
0 1
8 -1.350726 0.563117
2 0.869615 1.194704
5 1.857342 1.361229
6 -0.044353 -1.205002
3 -0.892915 -0.055133
1 -0.813410 -2.522672
0 0.316147 -0.767359
30% of the said DataFrame:
0 1
4 -0.341126 0.518266
7 -0.726346 -0.535147
9 1.051666 -0.441533

Sample Solution :

Python Code :

import pandas as pd
import numpy as np
df = pd.DataFrame(np.random.randn(10, 2))
print("Original DataFrame:")
print(df)
part_70 = df.sample(frac=0.7,random_state=10)
part_30 = df.drop(part_70.index)
print("\n70% of the said DataFrame:")
print(part_70)
print("\n30% of the said DataFrame:")
print(part_30)

Sample Output:

Original DataFrame:
          0         1
0  0.316147 -0.767359
1 -0.813410 -2.522672
2  0.869615  1.194704
3 -0.892915 -0.055133
4 -0.341126  0.518266
5  1.857342  1.361229
6 -0.044353 -1.205002
7 -0.726346 -0.535147
8 -1.350726  0.563117
9  1.051666 -0.441533

70% of the said DataFrame:
          0         1
8 -1.350726  0.563117
2  0.869615  1.194704
5  1.857342  1.361229
6 -0.044353 -1.205002
3 -0.892915 -0.055133
1 -0.813410 -2.522672
0  0.316147 -0.767359

30% of the said DataFrame:
          0         1
4 -0.341126  0.518266
7 -0.726346 -0.535147
9  1.051666 -0.441533

Python-Pandas Code Editor:

Have another way to solve this solution? Contribute your code (and comments) through Disqus.

Previous: Write a Pandas program to reset index in a given DataFrame.
Next: Write a Pandas program to combining two series into a DataFrame.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



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