您必须将函数的返回值分配给您可以使用的变量：
if rundecision in ['distance', 'd']:
pacetotal = pace() # pace returns the seconds
timetotal = time() # this should also return the value for your next computation
distance=calculator(distance=None,pace=pacetotal,time=timetotal)
return str(distance) + paceunit
您没有提供time() 函数，但如果它与速度相似，则应该可以。
因cmets中的问题而编辑：
关于如何处理返回值和您的程序的一些变化：
# Different ways to return something from a function
def ModifyGivenDict(di , li):
# do some calculations
di["milesPerHour"] = 42
li.append(999)
def ReturnAValue(x):
return x ** x
def ReturnMultipleValues(x):
return [x * u for u in range(20)]
def ReturnTuple(x,y):
return (x,y,x * y,x ** y,y ** x,"someValue")
d = {"Round1": 496 }
l = [2,3,4,5,"Hurray"]
a = ModifyGivenDict(d,l)
print(d)
k = ReturnAValue(22)
print(k)
i = ReturnMultipleValues(22)
print(i)
h = ReturnTuple(4,7)
print(h)
# OOP aproach
class Timings:
@staticmethod
def toSeconds(text):
"""Understands up to '12:18:24.3545' - returns a floatvalue of seconds"""
t = [0,0] + text.split(":") # prefix with 2 * 0 if only "22" or "1:22" is given
t[-1] = float(t[-1]) # make last elements to float
t[-2] = int(t[-2]) * 60 # make integer minutes into seconds
t[-3] = int(t[-3]) * 60 * 60 # make integer hours into seconds
return sum(t)
@staticmethod
def toMeters(distance):
"""Understands '255.23 meters'"""
converterDict = {'mile':1609.34, 'mi':1609.34, 'km':1000, 'kilometer':1000,
'y':0.9144, 'yard':0.9144, 'meter':1, 'm':1}
dist,unit = distance.split(" ")
dist = float(dist)
unit = unit.rstrip("s").strip().lower()
return dist * converterDict[unit]
def __init__(self, name):
self.name = name
self.laps = {}
self.lap = 0
def addLap(self, minutesColonSeconds, distance):
t = self.toSeconds(minutesColonSeconds)
m = self.toMeters(distance)
self.laps[self.lap] = {"time":t, "distance":m}
self.lap += 1
def printLaps(self):
print("Results for " + self.name,sep="\t")
print("{:<14} {:<14} {:<14} {:<14} {:<14} {:<14} {:<14}".format(
"lap","m","s","m/s", "total time", "total dist","speed"))
tm = 0
tt = 0
# you could also use an orderedDict from collections
for k in sorted(self.laps.keys()):
m = self.laps[k]["distance"]
t = self.laps[k]["time"]
tm +=m
tt += t
print("{:<14} {:<14} {:<14} {:<14} {:<14} {:<14} {:<14}".format(
k,m,t,round(m / t,2), tt,tm,round(tm/tt,2)))
def inputTime(text):
while True:
i = input(text)
try:
t = [0,0] + i.split(":")
sec = float(t[-1])
min = int(t[-2])
hou = int(t[-3])
if sec+min*60+hou*60*60 <= 0:
raise ValueError
return i
except (ValueError,EOFError):
print("Wrong input! Use '1:12:23.99' for hour:minute:second.partials")
def inputDistance(text):
while True:
t = input(text)
try:
dis,un = t.split()
dis = float(dis)
return t
except:
print("Wrong input. Use: '23 km' - or: meter, mile(s), yard(s), m, mi, y")
print("\nClassaproach\n\n")
timing = Timings("Just Me")
while True:
dis = inputDistance("What distance did you cover?")
tim = inputTime("In what time?")
timing.addLap(tim,dis)
timing.printLaps()
输出（经过编辑以更适合此处）：
{'Round1': 496, 'milesPerHour': 42}
341427877364219557396646723584
[0, 22, 44, 66, 88, 110, 132, 154, 176, 198, 220, 242, 264, 286,
308, 330, 352, 374, 396, 418]
(4, 7, 28, 16384, 2401, 'someValue')
Classaproach
What distance did you cover?100 m
In what time?12.02
Results for Just Me
lap m s m/s total time total dist speed
0 100.0 12.02 8.32 12.02 100.0 8.32
What distance did you cover?20 km
In what time?2:0:01
Results for Just Me
lap m s m/s total time total dist speed
0 100.0 12.02 8.32 12.02 100.0 8.32
1 20000.0 7201.0 2.78 7213.02 20100.0 2.79
What distance did you cover?5 mi
In what time?1:1:1
Results for Just Me
lap m s m/s total time total dist speed
0 100.0 12.02 8.32 12.02 100.0 8.32
1 20000.0 7201.0 2.78 7213.02 20100.0 2.79
2 8046.7 3661.0 2.2 10874.02 28146.7 2.59
What distance did you cover?120 km
In what time?1:02:00
Results for Just Me
lap m s m/s total time total dist speed
0 100.0 12.02 8.32 12.02 100.0 8.32
1 20000.0 7201.0 2.78 7213.02 20100.0 2.79
2 8046.7 3661.0 2.2 10874.02 28146.7 2.59
3 120000.0 3720.0 32.26 14594.02 148146.7 10.15
What distance did you cover?
...