Python - For loop - run each line of output

Question

I guess I am running into a beginner problem: -> I want to loop over an array and insert the the values into lines of code that are executed. For the attempt below I get "SyntaxError: can't assign to operator"

#Country-subsets (all countries in dataframe)
for s in country_filter:  
  s.lower() + '_immu_edu' = immu_edu.loc[immu_edu['CountryName'] == s]

Thanks for helping!

My expected output would be:

guinea_immu_edu = immu_edu.loc[immu_edu['CountryName'] == "Guinea"]
lao_immu_edu = immu_edu.loc[immu_edu['CountryName'] == "Lao PDR"]
bf_immu_edu = immu_edu.loc[immu_edu['CountryName'] == "Burkina Faso"]
us_immu_edu = immu_edu.loc[immu_edu['CountryName'] == "United States"]
ge_immu_edu = immu_edu.loc[immu_edu['CountryName'] == "Germany"]

_insert the the values into lines of code that are executed_ What do you mean? - Also what is your expected output? — B001ᛦ, Jun 26 '19 at 12:16
What does it mean to 'insert values into lines of code that are executed'? Can you show what your expected output is>? — WiseDev, Jun 26 '19 at 12:16
You need to store the result `s.lower() + '_immu_edu'` somewhere as it is a temporary (also known as an "rvalue" in some languages). You can't assign to it. — tehhowch, Jun 26 '19 at 12:17
So if `s` is the string `"foo"`, you want to create a variable named `foo_immu_edu`? That kind of "dynamic variable creation" is almost never a good idea. Use a dict instead: `d[s.lower() + '_immu_edu'] = whatever` — Kevin, Jun 26 '19 at 12:17
Possible duplicate of [How do I create a variable number of variables?](https://stackoverflow.com/questions/1373164/how-do-i-create-a-variable-number-of-variables) — Thierry Lathuille, Jun 26 '19 at 12:29

score 0 · Accepted Answer · answered Jun 26 '19 at 12:19

0

Store your values in a dictionary and access using the keys:

my_dict = dict()
for s in country_filter:  
  my_dict[s.lower() + '_immu_edu'] = immu_edu.loc[immu_edu['CountryName'] == s]

answered Jun 26 '19 at 12:19

Kshitij Saxena

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Python - For loop - run each line of output

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