Please note, this is a STATIC archive of website www.w3resource.com from 19 Jul 2022, cach3.com does not collect or store any user information, there is no "phishing" involved.
w3resource

Python: Move all spaces to the front of a given string in single traversal

Python String: Exercise-71 with Solution

Write a Python program to move all spaces to the front of a given string in single traversal.

Sample Solution:-

Python Code:

def moveSpaces(str1): 
    no_spaces = [char for char in str1 if char!=' ']   
    space= len(str1) - len(no_spaces)
    # Create string with spaces
    result = ' '*space    
    return result + ''.join(no_spaces)
  
s1 = "Python Exercises"
print("Original String:\n",s1)

print("\nAfter moving all spaces to the front:")
print(moveSpaces(s1))

Sample Output:

Original String:
 Python Exercises

After moving all spaces to the front:
 PythonExercises

Pictorial Presentation:

Python String: Move all spaces to the front of a given string in single traversal.

Flowchart:

Flowchart: Move all spaces to the front of a given string in single traversal

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:

Have another way to solve this solution? Contribute your code (and comments) through Disqus.

Previous: Write a Python program to create a string from two given strings concatenating uncommon characters of the said strings.
Next: Write a Python code to remove all characters except a specified character in a given string.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



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