Hey. Can someone tell me why I get this error?
I solved the problem. Here is my steps:
- I typed dir(data)
This also shows attributes of data. But it is much more reliable than .info(), I guess.
- In the output, all columns were listed except px1.
- I opened the actual .csv file and saw that there is a space after px1. I mean it was like that “…pt1,pt2,px1 ,px2,py1…”
- I deleted that space. Then it worked.