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Python: Create the running product of an iterable

Python Itertools: Exercise-2 with Solution

Write a Python program to generate the running product of the elements of an given iterable.

Sample Solution:

Python Code:

from itertools import accumulate
import operator
def running_product(it):
    return accumulate(it,operator.mul)

#List
result = running_product([1,2,3,4,5,6,7])
print("Running product of a list:")
for i in result:
    print(i)

#Tuple
result = running_product((1,2,3,4,5,6,7))
print("Running product of a Tuple:")
for i in result:
    print(i)

Sample Output:

Type of the new iterator:
<class 'itertools.chain'>
Running product of a list:
1
2
6
24
120
720
5040
Running product of a Tuple:
1
2
6
24
120
720
5040

Python Code Editor:


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Previous: Write a Python program to create an iterator from several iterables in a sequence and display the type and elements of the new iterator.
Next: Write a Python program to generate the running maximum, minimum value of the elements of an iterable.

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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