Python: Sort numbers based on strings
Python Programming Puzzles: Exercise-41 with Solution
Write a Python program to sort numbers based on strings.
Input: six one four one two three Output: one two three four six Input: six one four three two nine eight Output: one two three four six eight nine Input: nine eight seven six five four three two one Output: one two three four five six seven eight nine
Pictorial Presentation:
Sample Solution-1:
Python Code:
#License: https://bit.ly/3oLErEI
def test(strs):
return ' '.join([x for x in 'one two three four five six seven eight nine'.split() if x in strs])
strs = "six one four one two three"
print("Original string:",strs)
print("Sort numbers based on said strings:")
print(test(strs))
strs = "six one four three two nine eight"
print("\nOriginal string:",strs)
print("Sort numbers based on said strings:")
print(test(strs))
strs = "nine eight seven six five four three two one"
print("\nOriginal string:",strs)
print("Sort numbers based on said strings:")
print(test(strs))
Sample Output:
Original string: six one four one two three Sort numbers based on said strings: one two three four six Original string: six one four three two nine eight Sort numbers based on said strings: one two three four six eight nine Original string: nine eight seven six five four three two one Sort numbers based on said strings: one two three four five six seven eight nine
Flowchart:
Visualize Python code execution:
The following tool visualize what the computer is doing step-by-step as it executes the said program:
Sample Solution-2:
Python Code:
#License: https://bit.ly/3oLErEI
def test(strs):
nums = 'zero zero zero zero zero zero zero zero zero zero one one one one one one one one one one one one two two two two three three three three three four four four four four four five five five five five five five six six six six six six six seven seven seven seven seven seven seven seven eight eight eight eight eight eight eight eight nine nine nine nine nine nine nine nine nine'.split()
return " ".join([nums[i] for i in sorted([nums.index(x) for x in strs.split()])]).rstrip()
strs = "six one four one two three"
print("Original string:",strs)
print("Sort numbers based on said strings:")
print(test(strs))
strs = "six one four three two nine eight"
print("\nOriginal string:",strs)
print("Sort numbers based on said strings:")
print(test(strs))
strs = "nine eight seven six five four three two zero one"
print("\nOriginal string:",strs)
print("Sort numbers based on said strings:")
print(test(strs))
Sample Output:
Original string: six one four one two three Sort numbers based on said strings: one one two three four six Original string: six one four three two nine eight Sort numbers based on said strings: one two three four six eight nine Original string: nine eight seven six five four three two zero one Sort numbers based on said strings: zero one two three four five six seven eight nine
Flowchart:
Visualize Python code execution:
The following tool visualize what the computer is doing step-by-step as it executes the said program:
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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