PyPDF's PdfFileReader() having problems reading file, file not callable

So here is my import:

from pyPdf import PdfFileWriter, PdfFileReader

Here is were I write my pdf:

filenamer = filename + '.pdf'
pdf = PdfPages(filenamer)

(great naming convention, I know!)

I write some things to it.

I close it here:

pdf.close()

Here is where I try and read it:

input1 = PdfFileReader(file(filenamer, "rb"))

And here is the error:

Traceback (most recent call last):
  File "./datamine.py", line 405, in <module>
    input1 = PdfFileReader(file(filenamer, "rb"))
TypeError: 'file' object is not callable

I dont understand the error, because I know the file exists, and when I comment out this line, and subsequent lines to input1, the program runs fine.

It looks like you've assigned an open file to the name file, and then you can't use the builtin any more.