Didn't understand the output of the following Python 3 code with reduce function?

2020-08-28 Thread Shivlal Sharma 
I have seen this code on one of competative programming site but I didn't get 
it, Why output is 9?

from functools import *

def ADDS(a,b):
return a+1
nums = [1, 2, 3, 4, 5, 6, 7, 8, 9]
add = reduce(ADDS, nums)
print(add)

output: 9
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Re: Didn't understand the output of the following Python 3 code with reduce function?

2020-08-29 Thread Shivlal Sharma 
On Saturday, 29 August 2020 at 02:47:56 UTC+5:30, Ben Bacarisse wrote:
Thanks you all, I was really confused in this code.
> Shivlal Sharma  writes: 
> 
> > I have seen this code on one of competative programming site but I 
> > didn't get it, Why output is 9? 
> > 
> > from functools import * 
> > 
> > def ADDS(a,b): 
> > return a+1 
> > nums = [1, 2, 3, 4, 5, 6, 7, 8, 9] 
> > add = reduce(ADDS, nums) 
> > print(add) 
> > 
> > output: 9
> Hint: 
> 
> reduce(f, [e1, e2]) is f(e1, e2) 
> reduce(f, [e1, e2, e3]) is f(f(e1, e2), e3) 
> reduce(f, [e1, e2, e3, e4]) is f(f(f(e1, e2), e3), e4) 
> 
> Replace f with a function that adds one to its first argument. Does 
> that help? 
> 
> -- 
> Ben.
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Error in lambda function..!

2020-08-29 Thread Shivlal Sharma 
from functools import*
nums = [1, 2, 3, 4, 5, 6, 7, 8, 9]
add = reduce(lambda a : a + 1, nums)
print(add)

error: -
TypeError Traceback (most recent call last)
 in ()
  1 from functools import*
  2 nums = [1, 2, 3, 4, 5, 6, 7, 8, 9]
> 3 add = reduce(lambda a : a + 1, nums)
  4 print(add)

TypeError: () takes 1 positional argument but 2 were given
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Re: What this error want to say? Can't we use return without function?

2020-09-07 Thread Shivlal Sharma 
On Monday, 7 September 2020 at 12:57:16 UTC+5:30, Python wrote:
> Shivlal Sharma wrote: 
> > N = int(input("enter a positive integer:")) 
> > coun = 1 
> > while (N > 0): 
> > coun = coun * N 
> > N = N - 1 
> > return coun 
> > nice = ntime(N) 
> > print(nice) 
> > 
> > 
> > error: return outside of the function
> What did you expect return out of a function to even mean?
I mean that can't we use return keyword outside of the function?
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Re: What this error want to say? Can't we use return without function?

2020-09-07 Thread Shivlal Sharma 
On Monday, 7 September 2020 at 13:08:04 UTC+5:30, Chris Angelico wrote:
> On Mon, Sep 7, 2020 at 5:36 PM Shivlal Sharma  wrote: 
> > 
> > On Monday, 7 September 2020 at 12:57:16 UTC+5:30, Python wrote: 
> > > Shivlal Sharma wrote: 
> > > > N = int(input("enter a positive integer:")) 
> > > > coun = 1 
> > > > while (N > 0): 
> > > > coun = coun * N 
> > > > N = N - 1 
> > > > return coun 
> > > > nice = ntime(N) 
> > > > print(nice) 
> > > > 
> > > > 
> > > > error: return outside of the function 
> > > What did you expect return out of a function to even mean? 
> > I mean that can't we use return keyword outside of the function?
> Well... no. What do you expect it to mean? It's like asking "why can't 
> I use 'else' without 'if'?" - there'd need to be some meaning for it. 
> 
> ChrisA
Ohh, got it. you mean we can't you return without a function, right?

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Re: What this error want to say? Can't we use return without function?

2020-09-07 Thread Shivlal Sharma 
On Monday, 7 September 2020 at 13:10:57 UTC+5:30, Shivlal Sharma wrote:
> On Monday, 7 September 2020 at 13:08:04 UTC+5:30, Chris Angelico wrote: 
> > On Mon, Sep 7, 2020 at 5:36 PM Shivlal Sharma  wrote: 
> > > 
> > > On Monday, 7 September 2020 at 12:57:16 UTC+5:30, Python wrote: 
> > > > Shivlal Sharma wrote: 
> > > > > N = int(input("enter a positive integer:")) 
> > > > > coun = 1 
> > > > > while (N > 0): 
> > > > > coun = coun * N 
> > > > > N = N - 1 
> > > > > return coun 
> > > > > nice = ntime(N) 
> > > > > print(nice) 
> > > > > 
> > > > > 
> > > > > error: return outside of the function 
> > > > What did you expect return out of a function to even mean? 
> > > I mean that can't we use return keyword outside of the function? 
> > Well... no. What do you expect it to mean? It's like asking "why can't 
> > I use 'else' without 'if'?" - there'd need to be some meaning for it. 
> > 
> > ChrisA
> Ohh, got it. you mean we can't you return without a function, right?
Thank you guys!
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What this error want to say? Can't we use return without function?

2020-09-07 Thread Shivlal Sharma 
N = int(input("enter a positive integer:"))
coun = 1
while (N > 0):
coun = coun * N
N = N - 1
return coun
nice = ntime(N)
print(nice)


error: return outside of the function
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