how to change a string into dictionary

[aimeixu]

Hi,
I am newbie for python ,Here is my question:
a = "{'a':'1','b':'2'}"
how to change a into a dictionary ,says, a = {'a':'1','b':'2'}
Thanks a lot .Really need help.

 

[Ulrich Eckhardt]

a = "{'a':'1','b':'2'}"
how to change a into a dictionary ,says, a = {'a':'1','b':'2'}

You could evaluate it as regular Python code, using "exec":

res = {}
exec("a={'a':'1'}", res)
print res['a']

However, if this is input from a file or the user, be aware that this opens
loopholes for executing _any_ code, so you should only exec code from
sources you can trust.

Uli