S='a=65 b=66 c=67'

S='a=65 b=66 c=67'
L=s.split(' ')
D=dict()
A=''
i=0
While i<Len(L):
    A=L[i].split('=')
    D[a[i]]=a[i+1]
    i+2

print (D)

dict(i.split('=') for i in S.split())

{'a': '65', 'b': '66', 'c': '67'}

>>> import re
>>> eq = r'(?P<id>[a-z])=(?P<n>d+)b'
>>> dict(re.findall(eq, S))
{'a': '65', 'b': '66', 'c': '67'}