Re: [Tutor] Tkinter help?
On 18/05/15 19:27, cartman6921 wrote:
*Below is a code made by me in 5 minutes, I am new to Tkinter so am kinda
noobish.
We all have to start somewhere.
Unfortunately there are a few issues with your code.
I'll try to deal with them as we go through.
from tkinter import *
root=Tk()
root.title("Lemonade Stand")
root.geometry("500x500+500+300")
lemon=0
def BuyLemon():
str(lemon)+str(1)
print(lemon)
This function doesn't do what you think it does.
The second line takes the string representation of
lemon ('0') and adds the string representation of
1 ('1') using string concatenation to produce '01'
Then it throws it away.
Finally it prints lemon which remains unchanged as zero.
You need to have an assignment inside the function
that modifies lemon. But because you are modifying a
global variable you need to declare lemon as global
inside the function. So you get:
def buyLemon():
global lemon
lemon = str(lemon) + str(1)
print (lemon)
However if you just use that function you will wind
up, after 4 presses, with '0' which is not what
you want.
Instead of converting to strings just add the numbers:
def buyLemon():
global lemon
lemon +=1
print (lemon)
button = Button(root,text="Buy Lemon x1", command=BuyLemon)
button.pack()
root.mainloop()
Once you get that working your next step should be to get
the output printed on the GUI rather than the console. For
that you should probably start with a Label widget. You
can then assign the string representation of lemon to the
text attribute of the label.
--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
http://www.amazon.com/author/alan_gauld
Follow my photo-blog on Flickr at:
http://www.flickr.com/photos/alangauldphotos
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[Tutor] Tkinter help?
*Below is a code made by me in 5 minutes, I am new to Tkinter so am kinda
noobish. as you can see, lemon equals 0 at the start and when you click the
button it adds 1 to the amount lemon equals. After about 15 minutes of
trying and 10 minutes googling i can find nothing to help me. when the code
loops, lemon is set back to 0 again, how do i stop lemon from being set back
to 0.
I need it so if you press the button eg 4 times, lemon=4*
from tkinter import *
root=Tk()
root.title("Lemonade Stand")
root.geometry("500x500+500+300")
lemon=0
def BuyLemon():
str(lemon)+str(1)
print(lemon)
button = Button(root,text="Buy Lemon x1", command=BuyLemon)
button.pack()
root.mainloop()
--
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http://python.6.x6.nabble.com/Tkinter-help-tp5095151.html
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[Tutor] Apache cgi Python Sockets classic Linux permissions and SELinux under Fedora19
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Re: [Tutor] Stem and leaf plots
On Sun, May 17, 2015 at 02:50:39PM -0700, Danny Yoo wrote: > I was reading the "Cartoon Guide to Statistics", and came across a > description on "Stem and plot diagrams". > (http://en.wikipedia.org/wiki/Stem-and-leaf_display.) It's sorta like > a histogram diagram, but bundles by the ten's digit, and uses the > one's digit as the "point". > > Here's my attempt at describing it as a program: > > ### > """ > Stem and leaf plotting. > http://en.wikipedia.org/wiki/Stem-and-leaf_display. > """ > > import collections > import sys > > > def printStemPlot(values): > """Prints a stem plot of the values.""" > stems = collections.defaultdict(list) > for v in values: > stems[v / 10].append(v % 10) > > low, high = min(stems.keys()), max(stems.keys()) > padding = len(str(high)) > for i in range(low, high+1): > stems[i].sort() > print(str(i).ljust(padding) + ' | ' + > ' '.join(map(str, stems[i])))def printStemPlot(values): Nice! It doesn't cope with Stem-and-leaf plots in their full generality, e.g.: stem-widths which are not 10: 4 | 1 2 2 4 | 5 7 9 9 9 5 | 0 0 3 | 5 8 and you should print the stem and leaf width and give a key, but it's otherwise excellent. Thank you for sharing! -- Steve ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
