Re: [Tutor] Assigning range :p:
On Wed, Jul 27, 2011 at 9:11 PM, Thomas C. Hicks para...@pobox.com wrote: On Wed, 27 Jul 2011 20:16:31 -0400 Alexander Quest alexxqu...@gmail.com wrote: x=range(1,50) mid=x[len(x)/2] You would have to make sure there is a way to work around decimal points in the division. Also, I would try it in practice. (remember range(1, 50) does not include 50.) ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] Assigning range
Does anyone know how to assign a certain numerical range to a variable, and then choose the number that is the middle of that range? For example, I want to assign the variable X a range between 1 and 50, and then I want to have the middle of that range (25) return with some command when I call it (perhaps rangemid or something like that?). In pseudocode, I am trying to say X = range [1,50], return middle of range (which should return 25) but I don't know how to code it. This is for a basic program I'm trying to write where the player thinks of a number and the computer tries to guess the number in as few tries as possible. Thanks for any help! -Alex ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Assigning range
Alexander Quest wrote: Does anyone know how to assign a certain numerical range to a variable, and then choose the number that is the middle of that range? For example, I want to assign the variable X a range between 1 and 50, and then I want to have the middle of that range (25) return with some command when I call it (perhaps rangemid or something like that?). In pseudocode, I am trying to say X = range [1,50], return middle of range (which should return 25) but I don't know how to code it. This is for a basic program I'm trying to write where the player thinks of a number and the computer tries to guess the number in as few tries as possible. Thanks for any help! Forget about using range, that just adds meaningless complexity. What is important is that you have a lower bound, and a higher bound: two numbers, instead of how ever many (possible thousands, or millions!) in range(low, high). middle = (low+high)//2 -- Steven ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Assigning range
Thanks Steven- I'll try that out. -Alex On Wed, Jul 27, 2011 at 5:40 PM, Steven D'Aprano st...@pearwood.infowrote: Alexander Quest wrote: Does anyone know how to assign a certain numerical range to a variable, and then choose the number that is the middle of that range? For example, I want to assign the variable X a range between 1 and 50, and then I want to have the middle of that range (25) return with some command when I call it (perhaps rangemid or something like that?). In pseudocode, I am trying to say X = range [1,50], return middle of range (which should return 25) but I don't know how to code it. This is for a basic program I'm trying to write where the player thinks of a number and the computer tries to guess the number in as few tries as possible. Thanks for any help! Forget about using range, that just adds meaningless complexity. What is important is that you have a lower bound, and a higher bound: two numbers, instead of how ever many (possible thousands, or millions!) in range(low, high). middle = (low+high)//2 -- Steven __**_ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/**mailman/listinfo/tutorhttp://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Assigning range :p:
On Wed, 27 Jul 2011 20:16:31 -0400 Alexander Quest alexxqu...@gmail.com wrote: Does anyone know how to assign a certain numerical range to a variable, and then choose the number that is the middle of that range? For example, I want to assign the variable X a range between 1 and 50, and then I want to have the middle of that range (25) return with some command when I call it (perhaps rangemid or something like that?). In pseudocode, I am trying to say X = range [1,50], return middle of range (which should return 25) but I don't know how to code it. This is for a basic program I'm trying to write where the player thinks of a number and the computer tries to guess the number in as few tries as possible. Thanks for any help! -Alex There are probably better ways but this worked for me: x=range(1,50) mid=x[len(x)/2] You do have to keep in mind the way python counts list indices for a range call - i.e. x=range(1,50) will give you a list with all numbers 1 to 49 in it. Hope that helps! tom ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Assigning range
You could start with an anonymous function using the lambda operator, such as: mid_range = lambda x: x[len(x) // 2] Note: If you use len(x) / 2 in python 3.x you will get a TypeError because the division operator / returns a float. Floor // returns an int in 2.x and 3.x. Then use either: x = range(1000, 4001) mid_x = mid_range(x) # mid_x == 2500 or… mid_x = mid_range(range(500, 751)) # mid_x == 625 etc. to retrieve the middle element. You can extract the mid point of any sequence type, such as a string, using this function. mid_x = mid_range(‘12345678987654321’) # mid_x == ‘9’ middle_number = lambda lo, hi: abs(lo - hi) // 2 will work if you just need the mid point of two numbers; either ints or floats. mid_x = middle_number(0, 1000) # mid_x = 500 DW On Jul 27, 2011, at 8:16 PM, Alexander Quest wrote: Does anyone know how to assign a certain numerical range to a variable, and then choose the number that is the middle of that range? For example, I want to assign the variable X a range between 1 and 50, and then I want to have the middle of that range (25) return with some command when I call it (perhaps rangemid or something like that?). In pseudocode, I am trying to say X = range [1,50], return middle of range (which should return 25) but I don't know how to code it. This is for a basic program I'm trying to write where the player thinks of a number and the computer tries to guess the number in as few tries as possible. Thanks for any help! -Alex ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Assigning range
Thanks for that Donald! -Alex On Wed, Jul 27, 2011 at 8:16 PM, Donald Wilson donald...@me.com wrote: You could start with an anonymous function using the lambda operator, such as: mid_range = lambda x: x[len(x) // 2] Note: If you use len(x) / 2 in python 3.x you will get a TypeError because the division operator / returns a float. Floor // returns an int in 2.x and 3.x. Then use either: x = range(1000, 4001) mid_x = mid_range(x) # mid_x == 2500 or… mid_x = mid_range(range(500, 751)) # mid_x == 625 etc. to retrieve the middle element. You can extract the mid point of any sequence type, such as a string, using this function. mid_x = mid_range(‘12345678987654321’) # mid_x == ‘9’ middle_number = lambda lo, hi: abs(lo - hi) // 2 will work if you just need the mid point of two numbers; either ints or floats. mid_x = middle_number(0, 1000) # mid_x = 500 DW On Jul 27, 2011, at 8:16 PM, Alexander Quest wrote: Does anyone know how to assign a certain numerical range to a variable, and then choose the number that is the middle of that range? For example, I want to assign the variable X a range between 1 and 50, and then I want to have the middle of that range (25) return with some command when I call it (perhaps rangemid or something like that?). In pseudocode, I am trying to say X = range [1,50], return middle of range (which should return 25) but I don't know how to code it. This is for a basic program I'm trying to write where the player thinks of a number and the computer tries to guess the number in as few tries as possible. Thanks for any help! -Alex ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
