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Python: Product of a given list of numbers using lambda

Python Lambda: Exercise-42 with Solution

Write a Python program to calculate the product of a given list of numbers using lambda.

Sample Solution:

Python Code :

import functools 
def remove_duplicates(nums):
    result = functools.reduce(lambda x, y: x * y, nums, 1)
    return result
nums1 = [1,2,3,4,5,6,7,8,9,10]
nums2 = [2.2,4.12,6.6,8.1,8.3]
print("list1:", nums1)
print("Product of the said list numbers:")
print(remove_duplicates(nums1))
print("\nlist2:", nums2)
print("Product of the said list numbers:")
print(remove_duplicates(nums2))

Sample Output:

list1: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
Product of the said list numbers:
3628800

list2: [2.2, 4.12, 6.6, 8.1, 8.3]
Product of the said list numbers:
4021.8599520000007

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Next: Write a Python program to multiply all the numbers in a given list using lambda.

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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