human
Give me a code to remove duplicates from a string in O ( 1 ) extra space and the other steps required given the following:
Remove duplicates from a string in O ( 1 ) extra space | Function to remove duplicates.
keeps track of visited characters.
gets character value.
keeps track of length of resultant string.
check if Xth bit of counter is unset.
mark current character as visited.
Driver code"
How can the above be solved in Python?
assistant
#Here is code to remove duplicates from a string in O ( 1 ) extra space and the other steps required.
 def removeDuplicatesFromString ( str2 ) :
	counter = 0 ;
	i = 0 ;
	size = len ( str2 ) ;
	str1 = list ( str2 ) ;
	x = 0 ;
	length = 0 ;
	while ( i < size ) :
		x = ord ( str1 [ i ] ) - 97 ;
		if ( ( counter & ( 1 << x ) ) == 0 ) :
			str1 [ length ] = chr ( 97 + x ) ;
			counter = counter | ( 1 << x ) ;
			length += 1 ;
		i += 1 ;
	str2 = ' ' . join ( str1 ) ;
	return str2 [ 0 : length ] ;
str1 = " geeksforgeeks " ;
print ( removeDuplicatesFromString ( str1 ) ) ;