Argument lists

[ichabod801]

loc is not a function. If you want to understand how to use it, read a tutorial on pandas dataframes. It does indexing, like a list, but it's a bit more complicated. If you look at the loc documentation it has a link explaining the usage.

If you want the signature for a function, you type help(function) in the Python interpreter. There might be something useful if you type help(tdf.loc), but I don't have pandas installed at the moment, so I'm not sure.