How to get the value from a variable for the below scenario ? [Python]

Question

my_str = 'I am want you'
    l = ['my_str']
    for value in l:
        print value

I would like to fetch the value stored in my_str.

Expected output

I am want you

I don't think that's a good idea, instead of you I would use a dictionary. — Maroun, Apr 08 '15 at 07:57
`eval(l[0])` should work. Alternatively, you could use `locals()[l[0]]`. But in practice, you probably shouldn't do any of those. — tobias_k, Apr 08 '15 at 07:57

score 1 · Accepted Answer · answered Apr 08 '15 at 07:59

1

You can use eval.Otherwise use dictionary is good approach

my_string = 'I am want you'
l = ['my_string']

for value in l:
    print eval(value)

#output
I am want you

answered Apr 08 '15 at 07:59

itzMEonTV

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In my case, my_string is the variable name used in the other python file. I just need call it one function call – Vijay Anand Pandian Apr 08 '15 at 08:16

score 1 · Answer 2 · answered Apr 08 '15 at 08:06

"eval" seems a better solution, but "exec" is also feasible.

>>> my_string = 'hello world'
>>> l = ['my_string']
>>> for each in l:
...     exec 'print ' + each
...     exec 'a = ' + each
...     print 'a = %s' % a
...
hello world
a = hello world

I also agree that it is an bad idea to use eval/exec for this purpose. Using dictionary might be a better way.

score 1 · Answer 3 · edited May 23 '17 at 12:29

I am not 100% sure what your intention is. But if you want to get integer values from a string in python there are some solutions.

>>> import re
>>> string1 = "498results should get"
>>> map(int, re.findall(r'\d+', string1))
[498]

Solution from jamylak

This groups all numbers with the help of a regular expression and then maps them, thus inserting them into an array.

You then just could iterate over this array

>>> arr = map(int, re.findall(r'\d+', string1)) 
>>> for num in arr:
>>>     print num
498

Edit: Yeah, seems like I misunderstood your question

How to get the value from a variable for the below scenario ? [Python]

3 Answers3