使用r.assign将变量从python分配给R，然后使用read.table

I'm trying to use python to define a variable as a string, specifically, a path to a file. I then want python to pass that string to an R variable. I then want to use R's read.table function to write the contents of that file to the variable in R as a table. I'm using rpy2 and r.assign to accomplish this, but I'm getting no where. Any help would be appreciated! The error message I receive is pasted below the code.I'm trying to use python to define a variable a