1. Use strings to refer to variable names.
For example, there are two variables a="bbb" and bbb={"c":1}. How to quote a to get {"c":1}, which is the value of the variable bbb represented by the value of a'bbb' .
I googled it and found the following four ways on http://www.douban.com/group/topic/2193745/ to convert a string into a variable, respectively:
>>> exec('bed=5')
>>> bed
5
>>> exec('bedict={}')
>>> bedict
{
}
globals()['abc'] = 6
>>> globals()['bed'+str(3)] = {
}
>>> bed3
{
}
setattr(__builtins__, 'abc', 9)
__import__('sys')._getframe(0).f_globals['abc'] = 27
All four can be realized, so how to get {"c":1} by referencing a, it should be: >>> a='bbb'
'''
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'''
>>> bbb={
"c":1}
>>> exec('a=%s' % a)
>>> a
{
"c": 1}
It can be achieved. Is there any other way?
In addition, if you want to dynamically change the a in the exec string'a=%s'% a, instead of specifying a, don't you need to get the name of the variable a first. That is the second question.
2. Get its string from the variable name
For example, the variable a='bbb', generally the result of quoting a is the value of a'bbb', then how do I get the name string'a' of a? Is it necessary?