eval SyntaxError: invalid syntax in python

Question

I want to assign :

x0='123'    
x1='123'    
x2='123'    
x3='123'    
x4='123'    
x5='123'    
x6='123'    
x7='123'    
x8='123'    
x9='123'    

I write the code to express that i can get the output of a string 123 when input x1 or x8 .

for i in range(0,10):
    eval("x"+str(i)+"='123'")

Traceback (most recent call last):
File "<stdin>", line 2, in <module>
File "<string>", line 1
  x0='123'
  ^
SyntaxError: invalid syntax

How i can do that way?

Answer 1

For dynamic execution of statements use the exec function:

>>> exec('y = 3')
>>> y
3

eval usage: eval(expression).

The expression argument is parsed and evaluated as a Python expression.

e.g.:

>>> s = 3
>>> eval('s == 3')
True
>>> eval('s + 1')
4
>>> eval('s')
3
>>> eval('str(s) + "test"')
'3test'