Extract continuous numeric characters from a string in Python

[BashBedlam]

What you want to do is pickup each character after 'AA=' as long as it's a number or a decimal point. Combine those into a string and then convert it to a float. Here is one way to go about that:

data = ['Line 1: 123 NUBA AA=1.2345 $BB=1234.55',
	'Line 2: 123 NUBA MM AA=1.2345678&BB=1234.55',
	'Line 3: 123 NUBA RRNJH AA=1.2#ALPHA']

ACCEPTIBLE = '123456789.'
aa_numbers = []

for line in data :
	temp_number_string = ''
	marker = line.index ('AA=') + 3
	while line [marker] in ACCEPTIBLE :
		temp_number_string += line [marker]
		marker += 1
	aa_numbers.append (float (temp_number_string))

print (aa_numbers)