String formatting difficulties

[mmk1995]

Hi all,

I would like to ask, why the below code is valid,

def place_value(number): 
	return ("{:,.2f}".format(number)) 

print(place_value(1000000.006)) 

But below code is not valid?

def place_value(number): 
	return ("{:,8.2f}".format(number)) 

print(place_value(1000000.006)) 

Thanks!