human
Check if a string follows a ^ nb ^ n pattern or not | Python3 code to check a ^ nb ^ n pattern.
if length of str is odd return No.
check first half is ' a ' and other half is full of 'b.
Driver code.
Function call"
How can the above be solved in Python?

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Can you provide a code to check if a string follows a ^ nb ^ n pattern or not and the other steps required?
assistant
#Here is code to check if a string follows a ^ nb ^ n pattern or not and the other steps required.
 def isanbn ( str ) :
	n = len ( str )
	if n & 1 :
		return " No "
'
	for i in range ( int ( n / 2 ) ) :
		if str [ i ] != ' a ' or str [ n - i - 1 ] != ' b ' :
		return " No "
	return " Yes "
input_str = " ab "
print ( isanbn ( input_str ) )