Role in Python eval function

eval function is to achieve mutual conversion list, dict, tuple with STR 
STR function to list, dict, tuple into a string

# String into a list of 
A = "[[1,2], [3,4-], [5,6], [7, 8], [9,0]]" 
Print (type (A)) 
B = the eval (A) 
Print (B)

# String into a dictionary 
A = "{. 1: 'A', 2: 'B'}" 
Print (type (A)) 
B = the eval (A) 
Print (type (B)) 
Print (B)

# String into a tuple 
A = "([1,2], [3,4-], [5,6], [7, 8], (9,0))" 
Print (type (A)) 
B the eval = (A) 
Print (type (B)) 
Print (B)