python import parameter not working as expected

I have a parameter file

sqlparams.py

ref_var1 = '(1,2,3)'
ref_var2 = "('a','b','c')"
ref_var3 = "(1,2,3,4)"

rawsql.txt

select *
from emp.data
where id in ref_var1 and 
name in ref_var2 and 
idn in ref_var3

I'm trying to pass params from sqlparams.py file to rawsql.txt file to generate a new file called exec_sql_file.txt

This is what have got so far

import sqlparams
# filter non non built-in variable names
variables = [k for k in sqlparams.__dict__ if '__' not in k]

with open('rawsql.txt', 'r') as f:
    content = f.read()

for v in variables:
    content = content.replace(v, getattr(params, v))
with open('exec_sql_file.txt', 'w') as f:
    f.write(content)

However I get the following error

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-15-d376e3c45949> in <module>()
      1 
      2 for v in variables:
----> 3     content = content.replace(v, getattr(params, v))
      4 with open('exec_sql_file.txt', 'w') as f:
      5     f.write(content)

AttributeError: 'module' object has no attribute 'ref_var3'