CODEWITHSUNDEEP
pythonpython-2.7dictionaryimport
Dave
Dave

Reputation: 221

Dynamically pass dictionary name python

I have 2 scripts, say test.py and main.py.
My test.py contains only dictionaries (No other code).

I am running main.py by passing dict_name as a argument. Here I want to fetch the dict passed as argument from test.py and display it's content in main.py.

test.py 

config_123={"name":"Dave","age":25}
config_89033 = {"name":"alex","age":30}
.....

To run main.py (Note: here I am passing 1st argument with dots)

python main.py 1.2.3

main.py 

import sys
from test import *

if __name__ == '__main__':
   if len(sys.argv) != 2:
       print "error message"
       sys.exit(1)
   else:
       dict_name=sys.argv[1]
       #if dict_name contains '.' , replace it
       if '.' in dict_name:
           temp_name=dict_name.replace(".","")   #gives me 123
       else:
           temp_name = dict_name

       #here i want to print the content of dict from test.py
       print config_123    #it prints dict (as i am importing * from test)
       #but i need to create it dynamically.
       print "config_"+temp_name    #obviously it prints it as a string "config_123"  
       #how should i call it here?

In this case, how can I call config_123 from test.py and display the dict?

Upvotes: 1

Views: 147

Answers (3)

Alexander
Alexander

Reputation: 109686

You could also store the configs as a single dictionary keyed off of their name and then get them from there.

test.py
=======

configs = {'config_123': {"name":"Dave","age":25},
           'config_89033': {"name":"alex","age":30}}


main.py
=======
from test import configs

config = configs.get('config_123')

Upvotes: 1

Garrett R
Garrett R

Reputation: 2662

I'm not sure if this is the best way, but it seems to work.

You can use the built-in locals() function to get any local variables as a dictionary. Then, the get function for a dict seems to get the correct config:

import sys, test

dname = sys.argv[1]
config1 = {'name':'Bob'}
config2 = {'name':'Alice'}

#if the variable is local
print locals().get(dname, None)
#if it's in the test module
#config = getattr(test, dname)

The output looks like this:

python main.py config2
{'name': 'Alice'}

python main.py config1
{'name': 'Bob'}

Upvotes: 1

Mike Müller
Mike Müller

Reputation: 85522

Import the module with import test and use getattr() on the module:

import test

print getattr(test, 'config_123')

Output:

{'age': 25, 'name': 'Dave'}

Or in your case:

print getattr(test, 'config_' + temp_name )

Upvotes: 1

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