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 a single traversal.

Visual Presentation:

Sample Solution:

Python Code:

# Function to move spaces to front
def moveSpaces(str1):

  # List comprehension to remove spaces
  no_spaces = [char for char in str1 if char!=' ']
  
  # Get number of spaces
  space = len(str1) - len(no_spaces)

  # Create string with required spaces
  result = ' '*space

  # Return moved spaces + string without spaces
  return result + ''.join(no_spaces)

# Test string
s1 = "Python Exercises"  

# Print original string
print("Original String:\n",s1)

# Print message
print("\nAfter moving all spaces to the front:")

# Print result
print(moveSpaces(s1)) 

Sample Output:

Original String:
 Python Exercises

After moving all spaces to the front:
 PythonExercises

Flowchart:

Python Code Editor:

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.