Python 将函数结果存储到变量中
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Store function result into variable
提问by storks
I am trying to save the result of a function into a variable and print that variable on the screen, but when I print I see "none".
How to repair this?
我试图将函数的结果保存到一个变量中并在屏幕上打印该变量，但是当我打印时我看到“无”。
这个怎么修？
import time;
def hours():
localtime = time.localtime(time.time())
print (localtime.tm_hour)
def minutes():
localtime = time.localtime(time.time())
print (localtime.tm_min)
def seconds():
localtime = time.localtime(time.time())
print (localtime.tm_sec)
hours()
minutes()
seconds()
var = hours()
print(var)
采纳答案by vmonteco
You need to return a value that will be stored into the variable.
您需要返回一个将存储到变量中的值。
This way :
这边走 ：
def myfunction():
value = "myvalue"
return value
var = myfunction()
print(var)
>>> "myvalue"
Currently you're just printing the value in your function, not returning it , that's two different things.
目前你只是在你的函数中打印值，而不是返回它，这是两件不同的事情。
Edit:Also note that the default returned value is Nonewhen there is no return directive.
编辑：另请注意，默认返回值None是没有返回指令时。
回答by Harpal
You need to return localtime.tm_hournot print
你需要返回localtime.tm_hour不print
def hours():
localtime = time.localtime(time.time())
print (localtime.tm_hour)
return localtime.tm_hour
回答by Vincent Murphy
You are not returning the value. The script should do:
您没有返回值。脚本应该这样做：
import time;
def hours():
localtime = time.localtime(time.time())
print (localtime.tm_hour)
return localtime.tm_hour
In [11]: var = hours()
18
In [12]: print(var)
18
see https://docs.python.org/3.5/tutorial/controlflow.html#defining-functionsfor how to use return.
有关如何使用 return 的信息，请参阅https://docs.python.org/3.5/tutorial/controlflow.html#defining-functions。
回答by Mansur Ali
I able to make this working with return within function definition
我能够在函数定义中使用 return 进行此操作
def hourMin ():
localtime = time.localtime(time.time())
return '{0}{1}{2}'.format(localtime.tm_hour, localtime.tm_min, localtime.tm_sec)
def dateDay ():
localtime = time.localtime(time.time())
return '{0}{1}{2}'.format(localtime.tm_mday, localtime.tm_mon, localtime.tm_year)
Calling area
通话区
def rannum ():
for x in range(1):
valo = random.randint(1,21)*5
TimeHour = hourMin()
TimeDate = dateDay()
print ('Time is ' + str(hourMin()))
path = "/tmp/temp/"
curr = path + str(valo) + str(TimeDate)
try:
os.mkdir(curr)
except:
print('Creation of the directory %s failed' % path)
else:
print('Directory %s created ' % curr)
rannum()
