printing format string function and variable (python)

Question

definition of function & variable:

def secret_formula(started):
    jelly_beans = started * 500
    jars = jelly_beans / 1000
    crates = jars / 100
    return jelly_beans, jars, crates

start_point = 10000 / 10

print statement:

print """crazy different style:
startpoint: %d\n
beans:\t\t %d\n
jars:\t\t %d\n
crates:\t\t %d\n
""" % (start_point, (secret_formula(start_point)))

The error message I get is " %d format: a number is required, not a tuple. Please help me fix it. I´m really new to programming...or is it just not possible to pack a variable and a called function into the same formattet print?

you have the solution right there in your problem statement. `" %d format: a number is required, not a tuple`.also see about python `string formatting`.if you are new to programming work up on your basics. any decent tutorial/site about python will have thing you want to understand about basic constructs of python. — anekix, Jul 11 '17 at 11:55
It seems like you want to unpack your tuple `(secret_formula(start_point))` into several arguments. You can do that with the unpacking operator; i.e. `*(secret_formula(start_point))` — khelwood, Jul 11 '17 at 11:56

hiro protagonist · Answer 1 · 2017-07-11T12:54:06.890

a variant for in python 2:

print """crazy different style:
startpoint: %d\n
beans:\t\t %d\n
jars:\t\t %d\n
crates:\t\t %d\n
""" % ((start_point, ) + secret_formula(start_point))

where i create a new tuple by adding the tuple (start_point, ) to the result of your function.

in python 3 you can unpack the tuple with a *:

print("""crazy different style:
startpoint: %d\n
beans:\t\t %d\n
jars:\t\t %d\n
crates:\t\t %d\n
""" % (start_point, *secret_formula(start_point)))

omri_saadon · Answer 2 · 2017-07-11T12:05:43.230

Consider adding * in order to unpack the tuple (python 3.x solution):

print ("""crazy different style:
startpoint: %d\n
beans:\t\t %d\n
jars:\t\t %d\n
crates:\t\t %d\n
""" % (start_point, *(secret_formula(start_point))))

If you're using python 2.x can type:

start_point = 10000 / 10
res = secret_formula(start_point)
print """crazy different style:
startpoint: %d\n
beans:\t\t %d\n
jars:\t\t %d\n
crates:\t\t %d\n
""" % (start_point, res[0], res[1], res[2])

score 0 · Answer 3 · answered Jul 11 '17 at 11:57

0

#According to zen of python Explicit is better than implicit, so

bs, js, cs = secret_formula(start_point)

print """crazy different style:
startpoint: %d\n
beans:\t\t %d\n
jars:\t\t %d\n
crates:\t\t %d\n
""" % (start_point, bs, js, cs)

answered Jul 11 '17 at 11:57

Abijith Mg

2,193
16
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score 0 · Answer 4 · answered Jul 11 '17 at 12:05

Working on python 3

def secret_formula(started):
    jelly_beans = started * 500
    jars = jelly_beans / 1000
    crates = jars / 100
    return jelly_beans, jars, crates

start_point = 10000 / 10

print ("startpoint : {0} \n \
       beans:\t\t {1}  \n \
       jar :\t\t {2}".format(start_point,*secret_formula(start_point)[:2]))

output

startpoint : 1000.0 
    beans:       500000.0  
    jar :        500.0

printing format string function and variable (python)

4 Answers4