Python Forum

If I wanted to format decimal places in a print line, then I could do:

s = 37.3829
print('This is an example of formatting to 2 decimal places:  {:.2f}'.format(s))

What's the syntax for doing such formatting if printing to output_file.csv ?

You're misunderstanding - there's no difference, because you're creating a string with the format you want and then passing that to print or the function that will write the line in the file.

...and here's an example to illustrate:

s = 37.3829
output_string = 'This is an example of formatting to 2 decimal places:  {:.2f}'.format(s)

print (output_string)
with open ('tester.txt', 'w') as tester_file :
	tester_file.write (output_string)