Improvement over Recipe 577058 and cie.
easy_input() function extends the built-in input() function.
A question is prompted as well as some expected answers.
The user input can be incomplete (ie. y or ye instead of yes)
- If no list of expected answer is provided, default will be "yes/no".
- If no default answer is provided, default will be the first expected answer.
Try and see.
Disclaimer: written in python3, meant for *nix shell, indented with tabs
Avoided caveat: If some expected answer have the same beginning, the user can not enter too few letters. Ex: answer = ['continue', 'test', 'testicle'], user can not input t, te or tes because it will be ambiguous. User can however input test, which is not.
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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 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 | #!/usr/bin/env python3
def easy_input(question, answer=None, default=None):
"""Ask a question, return an answer.
<question> is a string that is presented to the user.
<answer> is a list of strings presented as a choice. User may type only first letters
<default> is the presumed answer if the user just hits <Enter>.
"""
if answer is None :
answer = ['yes', 'no']
else :
answer = [i.lower() for i in answer]
# if <default> is None or <default> is not an expected answers
# <default> will be the first of the expected answers
if default is None or default not in answer :
default = answer[0]
prompt = '/'.join([
"\x1b[1;1m{0}\x1b[1;m".format(i.capitalize()) if i == default else i
for i in answer
])
while True :
choice = input("{0} [{1}]: ".format(question, prompt)).lower()
if default is not None and choice == '':
return default
if choice in answer :
return choice
valid_answer = { i[:len(choice)] : i for i in answer }
if len(valid_answer) < len(answer) :
print(" -- Ambiguous, please use a more detailed answer.")
elif choice in valid_answer :
return valid_answer[choice]
else:
print(" -- Please answer only with {0} or {1}.".format(", ".join(answer[:-1]), answer[-1]))
if __name__ == '__main__' :
u = easy_input("vous habitez chez vos parents ?")
print("\nanswer was : {0}\n".format(u))
u = easy_input("ajouter au gloubiboulga ?", ['carotte', 'rutabaga', 'pomepeche'])
print("\nanswer was : {0}\n".format(u))
u = easy_input("alors, on dance ?", ['non', 'nui'], 'oui')
print("\nanswer was : {0}\n".format(u))
u = easy_input("question piège ?", ['continue', 'testicle', 'test', ])
print("\nanswer was : {0}\n".format(u))
|
would down-voters mind to let a useful remark ?