Issue with my code
Hi,
I'm trying to create this program that counts the occurrences of each digit in
a string which the user have to enter.
Here is my code:
s=input("Enter a string, eg(4856w23874): ")
s=list(s)
checkS=['0','1','2','3','4','5','6','7','8','9']
for i in s:
if i in checkS:
t=s.count(i)
if t>1:
for k in range(1,t):
s=s.remove(i)
print(i, "occurs", t,"times.")
elif t==1:
print(i,"occurs 1 time.")
else: pass
but it keeps showing this error:
t=s.count(i)
AttributeError: 'NoneType' object has no attribute 'count'
I wanted to show like this:
Example:
Enter a string: 3233456
3 occurs 3
2 occurs 1
4 occurs 1
5 occurs 1
6 occurs 1
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Re: Issue with my code
Also I’m using Python 3.2.3.
On Tuesday, February 5, 2013 1:38:55 PM UTC-5, maiden129 wrote:
> Hi,
>
>
>
> I'm trying to create this program that counts the occurrences of each digit
> in a string which the user have to enter.
>
>
>
> Here is my code:
>
>
>
> s=input("Enter a string, eg(4856w23874): ")
>
> s=list(s)
>
>
>
> checkS=['0','1','2','3','4','5','6','7','8','9']
>
>
>
> for i in s:
>
> if i in checkS:
>
> t=s.count(i)
>
> if t>1:
>
> for k in range(1,t):
>
> s=s.remove(i)
>
> print(i, "occurs", t,"times.")
>
>
>
> elif t==1:
>
> print(i,"occurs 1 time.")
>
> else: pass
>
>
>
> but it keeps showing this error:
>
>
>
> t=s.count(i)
>
> AttributeError: 'NoneType' object has no attribute 'count'
>
>
>
> I wanted to show like this:
>
>
>
> Example:
>
>
>
> Enter a string: 3233456
>
>
>
> 3 occurs 3
>
> 2 occurs 1
>
> 4 occurs 1
>
> 5 occurs 1
>
> 6 occurs 1
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Re: Issue with my code
On Tuesday, February 5, 2013 1:56:55 PM UTC-5, marduk wrote:
> On Tue, Feb 5, 2013, at 01:38 PM, maiden129 wrote:
>
> > Hi,
>
> >
>
> > I'm trying to create this program that counts the occurrences of each
>
> > digit in a string which the user have to enter.
>
> >
>
> > Here is my code:
>
> >
>
> > s=input("Enter a string, eg(4856w23874): ")
>
> > s=list(s)
>
> >
>
> > checkS=['0','1','2','3','4','5','6','7','8','9']
>
> >
>
> > for i in s:
>
> > if i in checkS:
>
> > t=s.count(i)
>
> > if t>1:
>
> > for k in range(1,t):
>
> > s=s.remove(i)
>
> > print(i, "occurs", t,"times.")
>
> >
>
> > elif t==1:
>
> > print(i,"occurs 1 time.")
>
> > else: pass
>
> >
>
> > but it keeps showing this error:
>
> >
>
> > t=s.count(i)
>
> > AttributeError: 'NoneType' object has no attribute 'count'
>
>
>
> s=s.remove(i) does not return a new list but modifies the list in
>
> place.
>
>
>
> So you probably just want
>
>
>
> >>> s.remove(i)
>
>
>
> Also, there are various inefficiencies in your code, but that is the
>
> main issue with the AttributeError.
when I removed "s.remove(i), it starts to repeat the number of occurrences too
many times like this:
2 occurs 3 times.
2 occurs 3 times.
3 occurs 3 times.
3 occurs 3 times.
2 occurs 3 times.
2 occurs 3 times.
5 occurs 1 time.
3 occurs 3 times.
3 occurs 3 times.
4 occurs 1 time.
3 occurs 3 times.
3 occurs 3 times.
1 occurs 1 time.
2 occurs 3 times.
2 occurs 3 times.
How can I stop this?
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Re: Issue with my code
How to reverse the two loops? On Tuesday, February 5, 2013 2:43:47 PM UTC-5, Dave Angel wrote: > On 02/05/2013 02:20 PM, maiden129 wrote: > > > On Tuesday, February 5, 2013 1:56:55 PM UTC-5, marduk wrote: > > >> On Tue, Feb 5, 2013, at 01:38 PM, maiden129 wrote: > > >> > > > > > > > > when I removed "s.remove(i), it starts to repeat the number of occurrences > > too > > > > > > many times like this: > > > > > > 2 occurs 3 times. > > > 2 occurs 3 times. > > > 3 occurs 3 times. > > > 3 occurs 3 times. > > > 2 occurs 3 times. > > > 2 occurs 3 times. > > > 5 occurs 1 time. > > > 3 occurs 3 times. > > > 3 occurs 3 times. > > > 4 occurs 1 time. > > > 3 occurs 3 times. > > > 3 occurs 3 times. > > > 1 occurs 1 time. > > > 2 occurs 3 times. > > > 2 occurs 3 times. > > > > > > How can I stop this? > > > > > > > As MRAB pointed out, don't delete items from a list you're iterating > > over. It can make the iterator go nuts. He suggests the collections > > module. > > > > But if you want to do it by hand, one approach is to reverse the two > > loops. Iterate over the characters in CheckS list, examining the entire > > s list for each one and figuring out how many times the character occurs. > > > > Another approach is to build a dict, or a defaultdict, to keep counts > > for each of the characters in CheckS. > > > > -- > > DaveA -- http://mail.python.org/mailman/listinfo/python-list
Struggling with program
I'm trying to do this assignment and it not working, I don't understand why... This is what I have to do: Write the definition of a class Player containing: An instance variable name of type String , initialized to the empty String. An instance variable score of type int , initialized to zero. A method called set_name that has one parameter, whose value it assigns to the instance variable name . A method called set_score that has one parameter, whose value it assigns to the instance variable score . A method called get_name that has no parameters and that returns the value of the instance variable name . A method called get_score that has no parameters and that returns the value of the instance variable score . No constructor need be defined. Here is my code: class Player: name = '' def __init__(self,score = 0) def set_name (self): self.name def set_score (self): self.score def get_name return name def get_score return score can someone please help me? -- http://mail.python.org/mailman/listinfo/python-list
Python GUI questions
Hello, I'm using python 3.2.3 and I'm making a program that show the of occurrences of the character in the string in Tkinter. My questions are: How can I make an empty Entry object that will hold a word that a user will enter? How to make an empty Entry object that will hold a single character that the user will enter? How to A Button object with a text equal to "Count"? Thanks in advance. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python GUI questions
On Tuesday, March 19, 2013 5:39:51 PM UTC-4, Chris Angelico wrote: > On Wed, Mar 20, 2013 at 6:01 AM, maiden129 wrote: > > > Hello, > > > > > > I'm using python 3.2.3 and I'm making a program that show the of > > occurrences of the character in the string in Tkinter. > > > > This sounds like homework. Have you had a try at it yourself before > > asking? If so, show us your code, and point out where the problem is; > > if not, give it your best effort before you try to get someone else to > > do it for you, as that's the only way to learn! > > > > ChrisA This is not homework, I'm trying to learn how do I create a empty object. That was my main question. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python GUI questions
On Tuesday, March 19, 2013 8:57:42 PM UTC-4, Rick Johnson wrote:
> On Tuesday, March 19, 2013 2:01:24 PM UTC-5, maiden129 wrote:
>
> > Hello,
>
> >
>
> > I'm using python 3.2.3 and I'm making a program that show
>
> > the of occurrences of the character in the string in
>
> > Tkinter.
>
> >
>
> > My questions are:
>
> >
>
> > How can I make an empty Entry object that will hold a word
>
> > that a user will enter?
>
>
>
> I believe you meant to say: "How can i CREATE an entry field to accommodate
> user input?"
>
>
>
> Easy.
>
>
>
> > How to make an empty Entry object that will hold a single
>
> > character that the user will enter?
>
>
>
> Not as easy, but still quite doable. Do you want to filter the input,
> allowing only a single character?
>
>
>
> > How to A Button object with a text equal to "Count"?
>
>
>
> Easy-pee-see. Follow this yellow brick road to enlightenment.
>
>
>
> http://effbot.org/tkinterbook/tkinter-whats-tkinter.htm
Hello,
Here is my try to answer some of questions:
from tkinter import *
class word:
def __init__(self,Entry,Character):
window = Tk()
window.title("Widget")
top = Tk()
L1 = Label(top, text="Enter a string")
L1.pack( side = LEFT)
E1 = Entry(top, bd =5)
E1.pack(side = RIGHT)
top.mainloop()
L2 = Label(bottom, text="Number of single characters")
L2.pack( side = LEFT)
E2 = Entry(bottom, bd =5)
button = Tkinter.Button(bottom, text ="Count", command =
countCharacter).pack()
def countChacater(self):
count = word.count(character)
I'm just struggling with only how to create an object that will hold a single
character that the user will enter.
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Re: Python GUI questions
On Tuesday, March 19, 2013 10:16:25 PM UTC-4, Rick Johnson wrote:
> On Mar 19, 8:25 pm, maiden129 wrote:
So should I redo my other code that I created with the radioButtons to change
the colors of a text?
from tkinter import *
class buttons:
def __init__(self):
window = Tk()
window.title("Radio buttons and buttons")
self.var = IntVar()
w1 = Radiobutton(window, text="Red", variable=self.var,
value=1,command=changeColor).pack()
w2 = Radiobutton(window, text="Yellow", variable=self.var,
value=2,command=changeColor).pack()
w3 = Radiobutton(window, text="White", variable=self.var,
value=3,command=changeColor).pack()
w4 = Radiobutton(window, text="Grey", variable=self.var,
value=4,command=changeColor).pack()
w5 = Radiobutton(window, text="Green", variable=self.var,
value=5,command=changeColor).pack()
B1 = Button ( window, text="<=", command=LEFT).pack()
B2 = Button ( window, text="=>", command=RIGHT).pack()
def changeColor(self):
self.var.get()
window.mainloop()
buttons()
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Global NameError Fix?
Hello,
I'm using the version 3.2.3 of Python and I am having an issue in my program
and I don't know how to fix it:
counterLabel["text"] = str(counter)
NameError: global name 'counterLabel' is not defined
Here is my program:
from tkinter import *
class CounterButton(Button):
def __init__(self, window):
super(CounterButton,self).__init__(window, text = "0",
command=self.startCounter)
def startCounter(self):
counter = int(self["text"])
counter +=1
counterLabel["text"] = str(counter)
window = Tk()
window.title("counter")
counterButton1 = CounterButton(window)
counterButton2 = CounterButton(window)
counterButton1.pack()
counterButton1.pack()
window.mainloop()
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