I am trying to extract data from excel sheet with and without def statement (functions) in python

Question

I have recently started learning PYTHON and I am facing some difficulty.

I am trying to extract data from excel sheet with and without def statement . So without def, I am getting valid output but when I extract data using def statement, I am getting "NONE" as output. Please help me to resolve this.

book=xlrd.open_workbook("E:\\Email.xlsx")

print(book.nsheets)

SheetName =book.sheet_by_name("gmail")

rows=SheetName.nrows

cols=SheetName.ncols

print(rows)

print(cols)

##### WITHOUT DEFINING ANY FUNCTION ####

table=list()

record=list()

for x in range(rows):

    for y in range(cols):

        record.append(SheetName.cell(x,y).value) 

        table.append(record)

        record=[]

        rows=rows+1

print(table)

O/P:[['Email ID:'], ['AVVC.com'], ['Password'], ['abcdefg']]

WITH DEF

 def getcell(rows,cols): table=list() record=list() for x in range(rows): for y in range(cols): record.append(SheetName.cell(x,y).value) table.append(record) record=[] rows=rows+1 return; v= getcell(0,1) print(v) 

O/P:NONE

Answer 1

When you call return in a function it stops the execution and passes back whatever is after it.

As you had your return with nothing after it, it was returning None (nothing). What you want to do is return the table list so that it works in the same way as when there wasn't a function . Also, as return stops the execution, it needs to be at the very end of your function - after the for-loops so that they can complete.

Making your function :

def getcell(rows,cols):
    table=list()
    record=list()
    for x in range(rows):
       for y in range(cols):
            record.append(SheetName.cell(x,y).value) 
            table.append(record)
            record=[]
            rows=rows+1

    return table