How do I identify number of cells in a csv line?

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CSV

Python2.7

I am reading a csv data and some of the row may have 5 cells and some of them may have 6. I want to check if a particular row has 5 cell or 6?

I am using python.

What I have tried:

Below is my code so far:

while _i<_len:
			if str(_data[_i][2]).lower().strip() == 'xxxx':
				_summary = str(_data[_i][1]).lower() + ' - '+ str(_data[_i][0]).lower()
			if str(_data[_i][5]).strip() in ("",None):
				_description = 'Anything: '+str(_data[_i][0]).lower()+'\n ABC: '+str(_data[_i][1]).lower()+'\n DEF: '+str(_data[_i][2]).lower()+'\n GHI: '+str(_data[_i][3]).lower()+'\n Category: '+str(_data[_i][4]).lower()'''

The part where I am checking if certain cell is empty is working and throwing index out of bound error if row only has 5 cells.