BadZipfile: File is not a zip file on Windows not on Mac OS
When trying to run code on my computer that my partner wrote on his computer, I get this error when I run

``` python
def read_excel(file):
    xl = pd.ExcelFile(file)
    df = xl.parse(0)
    return df
```

Here's the Error messages:
File "C:\Users\wjayn_000\Documents\GitHub\tippecanoe\app\views\lodging.py", line 19, in lodging_output
    hotels = read_excel(f)
  File "C:\Users\wjayn_000\Documents\GitHub\tippecanoe\app\views\functions.py", line 7, in read_excel
    xl = pd.ExcelFile(file)
  File "C:\Python27\lib\site-packages\pandas\io\excel.py", line 212, in **init**
    self.book = xlrd.open_workbook(file_contents=data)
  File "C:\Python27\lib\site-packages\xlrd__init__.py", line 399, in open_workbook
    zf = zipfile.ZipFile(timemachine.BYTES_IO(file_contents))
  File "C:\Python27\lib\zipfile.py", line 770, in **init**
    self._RealGetContents()
  File "C:\Python27\lib\zipfile.py", line 811, in _RealGetContents
    raise BadZipfile, "File is not a zip file"
