python format number with commas

In python format number with commas can be easily done by using f-strings:

num = 10000000
print(f"{num:,d}")
In this method, the part after the colon is the format specifier. The comma is the separator character you want, 
This is equivalent of using format(num, ",d") for older versions of python.
we can use my_string = '{:,.2f}'.format(my_number) to convert float value into commas as thousands separators.
my_number = 4385893.382939491
my_string = '{:,.2f}'.format(my_number)