loop through python pandas data frame

[Johnse]

That´s interesting. Maybe there is some unknown (invisible) character in front of this code? Please use a new cell (i assume you are using Jupyter notebook) and do not copy paste but type code into it.

I did retype it and use instead of c1, c2, d1, d2.
I am not using Jupyter, but Spyder.

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That´s interesting. Maybe there is some unknown (invisible) character in front of this code? Please use a new cell (i assume you are using Jupyter notebook) and do not copy paste but type code into it.

I found out what happen.
I was running the code line by line is why I got those message.
When I run them as chunks it works. Thanks !