Ask the user a question using raw_input() and looking something like this:
QUESTION [Y/n]
...validate...
See also: Recipe 577096 (query custom answers), Recipe 577097 (query yes/no/quit), Recipe 577098 (query long), Recipe 577099 (query)
Python, 31 lines
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Copy to clipboard1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 | def query_yes_no(question, default="yes"):
"""Ask a yes/no question via raw_input() and return their answer.
"question" is a string that is presented to the user.
"default" is the presumed answer if the user just hits <Enter>.
It must be "yes" (the default), "no" or None (meaning
an answer is required of the user).
The "answer" return value is one of "yes" or "no".
"""
valid = {"yes":"yes", "y":"yes", "ye":"yes",
"no":"no", "n":"no"}
if default == None:
prompt = " [y/n] "
elif default == "yes":
prompt = " [Y/n] "
elif default == "no":
prompt = " [y/N] "
else:
raise ValueError("invalid default answer: '%s'" % default)
while 1:
sys.stdout.write(question + prompt)
choice = raw_input().lower()
if default is not None and choice == '':
return default
elif choice in valid.keys():
return valid[choice]
else:
sys.stdout.write("Please respond with 'yes' or 'no' "\
"(or 'y' or 'n').\n")
|
Hello - this is my first post here and I am pretty new to python. This recipe looks perfect for what I need at the moment, but I am having trouble with the implementation. For example, I want my program to ask the user "do you want to use all the .fits files in this directory?"
If "yes" - proceed to a certain line later in the program If "no" - provide a .txt list of the files you would like to use
I cannot figure out how this code stores the answer to any question that is asked of it, so I cannot use the results of the query to take any specific action. Any ideas?
Better late than ever I guess, but basically Joe, the recipe given here doesn't store the answer, it just returns it, and the caller is responsible for either storing or ignoring the answer.
You copy/paste the above code into your current module or a separate one (in that case import it). In this example below I've copy/pasted the recipe into MyModule.py. Then in the module where I want to use it...
import MyModule
answer = MyModule.query_yes_no("Do you want to use all the .fits files in this directory?") if answer == "no": get_txt_files() else: do_something_else()
What is a bout the licence of this code? I want to use it in a GPLv3 software.