Pandas Practice Set-1: Read specified rows and all columns of diamonds DataFrame

Last update on May 28 2022 13:39:02 (UTC/GMT +8 hours)

Pandas Practice Set-1: Exercise-49 with Solution

Write a Pandas program to read specified rows and all columns of 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("First 7 rows:")
print(diamonds.head(7))
print("\nAll columns:")
print(diamonds.loc[0, :])

Sample Output:

First 7 rows:
   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
5   0.24  Very Good     J    VVS2   62.8   57.0    336  3.94  3.96  2.48
6   0.24  Very Good     I    VVS1   62.3   57.0    336  3.95  3.98  2.47

All columns:
carat       0.23
cut        Ideal
color          E
clarity      SI2
depth       61.5
table         55
price        326
x           3.95
y           3.98
z           2.43
Name: 0, dtype: object

Python Code Editor:

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Previous:Write a Pandas program to concatenate the diamonds DataFrame with the 'color' Series.
Next: Write a Pandas program to read rows 0, 5, 7 and all columns of 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