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Pandas Practice Set-1: Find the number of rows and columns and data type of each column of diamonds Dataframe

Pandas Practice Set-1: Exercise-5 with Solution

Write a Pandas program to find the number of rows and columns and data type of each column 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("Number of rows and columns:")
print(diamonds.shape)
print("\nData type of each column:")
print(diamonds.dtypes)

Sample Output:

Number of rows and columns:
(53940, 10)

Data type of each column:
carat      float64
cut         object
color       object
clarity     object
depth      float64
table      float64
price        int64
x          float64
y          float64
z          float64
dtype: object

Python Code Editor:


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Previous: Write a Pandas program to create a new 'Quality –color' Series (use bracket notation to define the Series name) of the diamonds DataFrame.
Next: Write a Pandas program to summarize only 'object' columns of the diamonds Dataframe.

What is the difficulty level of this exercise?



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