Hiya to whoever might stumble across this.
I've recently taken up learning how to script/program in python.
I've made my first program, a simple fahrenheit-celsius converter,
both ways.
For some reason I fail to comprehend, the program writes a line of
"None" when rerun in a while loop.
Here is the code:
---START---
def choice_c():
print
celsius = input("Input celsius: ")
print "Fahrenheit: ",cel_fah(celsius)
print
def choice_f():
print
fahrenheit = input("Input fahrenheit: ")
print "Celsius: ",fah_cel(fahrenheit)
print
def cel_fah(placeholder):
return 9.0/5.0*placeholder+32
def fah_cel(placeholder):
return (placeholder-32.0)*5.0/9.0
def options():
print "press 'c' to convert celsius to fahrenheit."
print "press 'f' to convert fahrenheit to celsius."
print "press 'q' to exit program."
choice = "n"
options()
while choice != "q":
choice = raw_input("Choice: ")
if choice == "c":
choice_c()
elif choice == "f":
choice_f()
print options()
---END---
Any of you know why it prints that line? Is is just my comp?
If any applies, how to get around it?
Would greatly appreciate the help. 2 1583
On 30 Sep 2004 12:15:24 -0700, La******@gmail.com (Lazareth S. Link)
wrote: Hiya to whoever might stumble across this.
I've recently taken up learning how to script/program in python. I've made my first program, a simple fahrenheit-celsius converter, both ways. For some reason I fail to comprehend, the program writes a line of "None" when rerun in a while loop. Here is the code:
---START--- def choice_c(): print celsius = input("Input celsius: ") print "Fahrenheit: ",cel_fah(celsius) print
def choice_f(): print fahrenheit = input("Input fahrenheit: ") print "Celsius: ",fah_cel(fahrenheit) print
def cel_fah(placeholder): return 9.0/5.0*placeholder+32
def fah_cel(placeholder): return (placeholder-32.0)*5.0/9.0
def options(): print "press 'c' to convert celsius to fahrenheit." print "press 'f' to convert fahrenheit to celsius." print "press 'q' to exit program."
choice = "n" options() while choice != "q": choice = raw_input("Choice: ") if choice == "c": choice_c() elif choice == "f": choice_f() print options()
This is your problem.
You're telling python to print the resultof the function options()
When called options prints the options - but it doesn't have an
explicit return value. This means that it returns None when it has
finished and python duly prints that for you.
Replace 'print options()' with just 'options()' which will just call
the options procedure without expecting a return value.
HTH
Regards,
Fuzzy
---END---
Any of you know why it prints that line? Is is just my comp? If any applies, how to get around it? Would greatly appreciate the help.
Fuzzyman <fu******@gmail.com> wrote in message news:<61********************************@4ax.com>. .. This is your problem. You're telling python to print the resultof the function options() When called options prints the options - but it doesn't have an explicit return value. This means that it returns None when it has finished and python duly prints that for you.
Replace 'print options()' with just 'options()' which will just call the options procedure without expecting a return value.
HTH
Regards,
Fuzzy
Doh, soo simple, thanks alot Fuzzy =D
I should be more observant in the future. This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
by: Ray |
last post by:
Hello guys,
OK, I've been reading some more about Python. There are some things
about Python exception that I haven't been able to grasp:
1. This is a small thing, but why is object spelled...
|
by: adamurbas |
last post by:
ya so im pretty much a newb to this whole python thing... its pretty
cool but i just started today and im already having trouble. i
started to use a tutorial that i found somewhere and i followed...
|
by: Nathan Pinno |
last post by:
How do I factor a number? I mean how do I translate x! into proper
Python code, so that it will always do the correct math?
Thanks in advance,
Nathan P.
|
by: Derek Martin |
last post by:
Hi kids!
I've got some code that uses select.select() to capture all the output
of a subprocess (both stdout and stderr, see below). This code works
as expected on a variety of Fedora systems...
|
by: joemacbusiness |
last post by:
Hi All,
How do I format printed data in python?
I could not find this in the Python Reference Manual:
http://docs.python.org/ref/print.html
Nor could I find it in Matloff's great tutorial:...
|
by: anonymous |
last post by:
1 Objective to write little programs to help me learn German. See code
after numbered comments. //Thanks in advance for any direction or
suggestions.
tk
2 Want keyboard answer input, for...
|
by: Liang Chen |
last post by:
Hope you all had a nice weekend.
I have a question that I hope someone can help me out. I want to run a Python program that uses Tkinter for the user interface (GUI). The program allows me to type...
|
by: schwarz |
last post by:
As part of some research I am doing a Python Virtual Machine in Java,
and the exact semantics of the STORE_NAME bytecode is unclear to be,
so I was hoping somebody here could clarify it.
The...
|
by: taylorcarr |
last post by:
A Canon printer is a smart device known for being advanced, efficient, and reliable. It is designed for home, office, and hybrid workspace use and can also be used for a variety of purposes. However,...
|
by: Charles Arthur |
last post by:
How do i turn on java script on a villaon, callus and itel keypad mobile phone
|
by: aa123db |
last post by:
Variable and constants
Use var or let for variables and const fror constants.
Var foo ='bar';
Let foo ='bar';const baz ='bar';
Functions
function $name$ ($parameters$) {
}
...
|
by: ryjfgjl |
last post by:
If we have dozens or hundreds of excel to import into the database, if we use the excel import function provided by database editors such as navicat, it will be extremely tedious and time-consuming...
|
by: emmanuelkatto |
last post by:
Hi All, I am Emmanuel katto from Uganda. I want to ask what challenges you've faced while migrating a website to cloud.
Please let me know.
Thanks!
Emmanuel
|
by: nemocccc |
last post by:
hello, everyone, I want to develop a software for my android phone for daily needs, any suggestions?
|
by: Hystou |
last post by:
There are some requirements for setting up RAID:
1. The motherboard and BIOS support RAID configuration.
2. The motherboard has 2 or more available SATA protocol SSD/HDD slots (including MSATA, M.2...
|
by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However,...
|
by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can...
| | |