Concatenate variable name in python

Question

I have a set of table names

1. EOM
2.STMT
3.LOOKUP etc

I want to associate these table names with some variables names such as

1. start_time, 
2. end_time, 
3. total_time etc.

The way I want to write these variable names is something like

1. start_time_EOM, end_time_EOM, total_time_EOM
2. start_time_STMT, end_time_STMT,total_time_STMT
3. start_time_LOOKUP,end_time_LOOKUP,total_time_LOOKUP

Can this be done in python, and how? (Note: I am new to Python, and still trying to learn).

Are you using a library like Pandas or something? You mentioned tables... — Chris
– Chris, Commented Jul 7, 2017 at 15:49
Yes, it can be done by polluting globals() and no, you should not be doing it. — zwer
– zwer, Commented Jul 7, 2017 at 15:50

Cereveloper · Accepted Answer · 2017-07-07 16:34:50Z

3

Yup, dictionaries are solution:

tables=["A","B","C"]
vars = ["var1","var2","var3"]
dict={}
for val in tables:
  for val2 in vars:
    dict[val2+"_"+val] = foo
    dict[val2+"_"+val] = bar
    dict[val2+"_"+val] = foobar
#and so

Hope if helps

edited Jul 7, 2017 at 16:34

answered Jul 7, 2017 at 16:26

Cereveloper

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2 Comments

Gompu Over a year ago

Thank you so much! This was very helpful. Question: How can the same problem be solved in R?

Cereveloper Over a year ago

@Gompu Sorry, IDK about R. Hope you find the solution. Greetings!

Cary Shindell · Accepted Answer · 2017-07-07 15:48:52Z

2

You cannot change variables names the way you are looking to do, but you might try using a python dictionary to achieve what you're trying to accomplish.

answered Jul 7, 2017 at 15:48

Cary Shindell

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2 Comments

Dale Wilson Over a year ago

you could probably jury-rig something using eval() but Cary is right, you really don't want to do it this way.

Gompu Over a year ago

Thank you so much! How can the same problem be solved in R?

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