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Python: Generate and print a dictionary that contains a number in the form (x, x*x)

Python dictionary: Exercise-6 with Solution

Write a Python script to generate and print a dictionary that contains a number (between 1 and n) in the form (x, x*x).

Sample Solution:-

Python Code:

n=int(input("Input a number "))
d = dict()

for x in range(1,n+1):
    d[x]=x*x

print(d)

Sample Output:

10                                                                                                            
{1: 1, 2: 4, 3: 9, 4: 16, 5: 25, 6: 36, 7: 49, 8: 64, 9: 81, 10: 100}

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Previous: Write a Python program to iterate over dictionaries using for loops.
Next: Write a Python script to print a dictionary where the keys are numbers between 1 and 15 (both included) and the values are square of keys.

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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