Python: Create the largest possible number using the elements of a given list of integers
Python List: Exercise - 179 with Solution
Write a Python program to create the largest possible number using the elements of a given list of positive integers.
Sample Solution:
Python Code:
def create_largest_number(lst):
if all(val == 0 for val in lst):
return '0'
result = ''.join(sorted((str(val) for val in lst), reverse=True,
key=lambda i: i*( len(str(max(lst))) * 2 // len(i))))
return result
nums = [3, 40, 41, 43, 74, 9]
print("Original list:")
print(nums)
print("Largest possible number using the elements of the said list of positive integers:")
print(create_largest_number(nums))
nums = [10, 40, 20, 30, 50, 60]
print("\nOriginal list:")
print(nums)
print("Largest possible number using the elements of the said list of positive integers:")
print(create_largest_number(nums))
nums = [8, 4, 2, 9, 5, 6, 1, 0]
print("\nOriginal list:")
print(nums)
print("Largest possible number using the elements of the said list of positive integers:")
print(create_largest_number(nums))
Sample Output:
Original list: [3, 40, 41, 43, 74, 9] Largest possible number using the elements of the said list of positive integers: 9744341403 Original list: [10, 40, 20, 30, 50, 60] Largest possible number using the elements of the said list of positive integers: 605040302010 Original list: [8, 4, 2, 9, 5, 6, 1, 0] Largest possible number using the elements of the said list of positive integers: 98654210
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Previous: Write a Python program to insert a specified element in a given list after every nth element.
Next: Write a Python program to create the smallest possible number using the elements of a given list of positive integers.
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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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