Exercise 5: More Variables And Printing

my_name = 'Zed A. Shaw'
my_age = 35 # not a lie
my_height = 74 # inches
my_weight = 180 # lbs
my_eyes = 'Blue'
my_teeth = 'White'
my_hair = 'Brown'
print "Let's talk about %s." % my_name
print "He's %d inches tall." % my_height
print "He's %d pounds heavy." % my_weight
print "Actually that's not too heavy."
print "He's got %s eyes and %s hair." % (my_eyes, my_hair)
print "His teeth are usually %s depending on the coffee." % my_teeth
# this line is tricky, try to get it exactly right
print "If I add %d, %d, and %d I get %d." % (my_age, my_height, my_weight, my_age + my_height + my_weight)

Try more format characters. %r is a very useful one. It's like saying "print this no matter what".

You can use the round() function like this: round(1.7333).  round(flt, ndig=0) 四舍五入

Python format characters

Conversion	Meaning	Notes
d	Signed integer decimal.
i	Signed integer decimal.
o	Unsigned octal.	(1)
u	Unsigned decimal.
x	Unsigned hexadecimal (lowercase).	(2)
X	Unsigned hexadecimal (uppercase).	(2)
e	Floating point exponential format (lowercase).
E	Floating point exponential format (uppercase).
f	Floating point decimal format.
F	Floating point decimal format.
g	Same as "e" if exponent is greater than -4 or less than precision, "f" otherwise.
G	Same as "E" if exponent is greater than -4 or less than precision, "F" otherwise.
c	Single character (accepts integer or single character string).
r	String (converts any python object using repr()).	(3)
s	String (converts any python object using str()).	(4)
%	No argument is converted, results in a "%" character in the result.