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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

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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.

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Python: Tips of the Day

What is the difference between Python's list methods append and extend?

append: Appends object at the end.

x = [1, 2, 3]
x.append([4, 5])
print (x)

Output:

[1, 2, 3, [4, 5]]

extend: Extends list by appending elements from the iterable.

x = [1, 2, 3]
x.extend([4, 5])
print (x)

Output:

[1, 2, 3, 4, 5]

Ref: https://bit.ly/2AZ6ZFq