Python Challenges: Each element at index i of an array is the product of all the numbers of a given array except the one at i
Python Challenges - 1: Exercise-54 with Solution
Write a Python program to create a new array such that each element at index i of the new array is the product of all the numbers of a given array of integers except the one at i.
Input: [10, 20, 30, 40, 50]
Output: [1200000, 600000, 400000, 300000, 240000]
Input: [1, 2, 0, 4]
Output: [0, 0, 8, 0]
Sample Solution:
Python Code:
def product(nums):
new_nums = []
for i in nums:
nums_product = 1
for j in nums:
if j != i:
nums_product = nums_product * j
new_nums.append(nums_product)
return new_nums
print(product([10, 20, 30, 40, 50]))
print(product([1, 2, 0, 4]))
print(product([1, 2, 3, -4]))
Sample Output:
[1200000, 600000, 400000, 300000, 240000] [0, 0, 8, 0] [-24, -12, -8, 6]
Flowchart:
Python Code Editor:
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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
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