How to check if .xls and .csv files are empty

Question

Question 1: How can I check if an entire .xls or .csv file is empty.This is the code I am using:

try:
    if os.stat(fullpath).st_size > 0:
       readfile(fullpath)
    else:
       print "empty file"
except OSError:
    print "No file"

An empty .xls file has size greater than 5.6kb so it is not obvious whether it has any contents. How can I check if an xls or csv file is empty?

Question 2: I need to check the header of the file. How can I tell python that files which are just a single row of headers are empty?

import xlrd
def readfile(fullpath)
    xls=xlrd.open_workbook(fullpath)  
    for sheet in xls.sheets():
        number_of_rows = sheet.nrows 
        number_of_columns = sheet.ncols
        sheetname = sheet.name
        header = sheet.row_values(0) #Then if it contains only headers, treat it as empty.

This is my attempt. How do I continue with this code?

Please provide a solution for both questions. Thanks in advance.

Answer 1

This is simple in pandas with the .empty method. Do this

import pandas as pd

df = pd.read_csv(filename) # or pd.read_excel(filename) for xls file
df.empty # will return True if the dataframe is empty or False if not.

This will also return True for a file with only headers as in

>> df = pd.DataFrame(columns = ['A','B'])
>> df.empty
   True