Python 3.6+ function to ask for a multiple-choice answer












4












$begingroup$


# Standard multi choice question template

def multiChoiceQuestion(options: list):

    while True:

        print("nEnter the number of your choice - ")

        for x in len(options):

            print(str((x + 1)) + ". " + options[x])

        print("n")

        try:

            answer = int(input())

        except ValueError:

            print("Doesn't seem like a number! Try again!")

            continue

        if answer < 1 or answer > len(options):

            print("That option does not exist! Try again!")

            continue

        return answer


I created a template to ask a multi choice question in python. The loop will never reach it's end, since there is always a continue or a return statement. Is the while True condition appropriate for it?






python python-3.x validation







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  • $begingroup$
    "The loop will never reach it's end ... Is the while True condition appropriate for it?" That depends on whether that is the intended behaviour. Is it?
    $endgroup$
    – Mast
    10 hours ago






  • 1




    $begingroup$
    Side note: for x in len(options): will produce an error as Python doesn't allow iteration over an integer. 200_success's approach is the way to go here, but for future reference, use for x in range(len(options)): if you really need to loop a certain number of times. This takes the len(options) integer and creates an interable out of it.
    $endgroup$
    – JDG
    8 hours ago


















4












$begingroup$


# Standard multi choice question template

def multiChoiceQuestion(options: list):

    while True:

        print("nEnter the number of your choice - ")

        for x in len(options):

            print(str((x + 1)) + ". " + options[x])

        print("n")

        try:

            answer = int(input())

        except ValueError:

            print("Doesn't seem like a number! Try again!")

            continue

        if answer < 1 or answer > len(options):

            print("That option does not exist! Try again!")

            continue

        return answer


I created a template to ask a multi choice question in python. The loop will never reach it's end, since there is always a continue or a return statement. Is the while True condition appropriate for it?






python python-3.x validation







share|improve this question









New contributor




Holyprogrammer is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.







$endgroup$












  • $begingroup$
    "The loop will never reach it's end ... Is the while True condition appropriate for it?" That depends on whether that is the intended behaviour. Is it?
    $endgroup$
    – Mast
    10 hours ago






  • 1




    $begingroup$
    Side note: for x in len(options): will produce an error as Python doesn't allow iteration over an integer. 200_success's approach is the way to go here, but for future reference, use for x in range(len(options)): if you really need to loop a certain number of times. This takes the len(options) integer and creates an interable out of it.
    $endgroup$
    – JDG
    8 hours ago
















4












4








4





$begingroup$


# Standard multi choice question template

def multiChoiceQuestion(options: list):

    while True:

        print("nEnter the number of your choice - ")

        for x in len(options):

            print(str((x + 1)) + ". " + options[x])

        print("n")

        try:

            answer = int(input())

        except ValueError:

            print("Doesn't seem like a number! Try again!")

            continue

        if answer < 1 or answer > len(options):

            print("That option does not exist! Try again!")

            continue

        return answer


I created a template to ask a multi choice question in python. The loop will never reach it's end, since there is always a continue or a return statement. Is the while True condition appropriate for it?






python python-3.x validation







share|improve this question









New contributor




Holyprogrammer is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.







$endgroup$




# Standard multi choice question template

def multiChoiceQuestion(options: list):

    while True:

        print("nEnter the number of your choice - ")

        for x in len(options):

            print(str((x + 1)) + ". " + options[x])

        print("n")

        try:

            answer = int(input())

        except ValueError:

            print("Doesn't seem like a number! Try again!")

            continue

        if answer < 1 or answer > len(options):

            print("That option does not exist! Try again!")

            continue

        return answer


I created a template to ask a multi choice question in python. The loop will never reach it's end, since there is always a continue or a return statement. Is the while True condition appropriate for it?






python python-3.x validation




python python-3.x validation






share|improve this question









New contributor




Holyprogrammer is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











share|improve this question









New contributor




Holyprogrammer is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









share|improve this question




share|improve this question








edited 54 secs ago







Holyprogrammer













New contributor




Holyprogrammer is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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asked 11 hours ago









HolyprogrammerHolyprogrammer

1498




1498




New contributor




Holyprogrammer is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.





New contributor





Holyprogrammer is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.






Holyprogrammer is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.












  • $begingroup$
    "The loop will never reach it's end ... Is the while True condition appropriate for it?" That depends on whether that is the intended behaviour. Is it?
    $endgroup$
    – Mast
    10 hours ago






  • 1




    $begingroup$
    Side note: for x in len(options): will produce an error as Python doesn't allow iteration over an integer. 200_success's approach is the way to go here, but for future reference, use for x in range(len(options)): if you really need to loop a certain number of times. This takes the len(options) integer and creates an interable out of it.
    $endgroup$
    – JDG
    8 hours ago




















  • $begingroup$
    "The loop will never reach it's end ... Is the while True condition appropriate for it?" That depends on whether that is the intended behaviour. Is it?
    $endgroup$
    – Mast
    10 hours ago






  • 1




    $begingroup$
    Side note: for x in len(options): will produce an error as Python doesn't allow iteration over an integer. 200_success's approach is the way to go here, but for future reference, use for x in range(len(options)): if you really need to loop a certain number of times. This takes the len(options) integer and creates an interable out of it.
    $endgroup$
    – JDG
    8 hours ago


















$begingroup$
"The loop will never reach it's end ... Is the while True condition appropriate for it?" That depends on whether that is the intended behaviour. Is it?
$endgroup$
– Mast
10 hours ago




$begingroup$
"The loop will never reach it's end ... Is the while True condition appropriate for it?" That depends on whether that is the intended behaviour. Is it?
$endgroup$
– Mast
10 hours ago




1




1




$begingroup$
Side note: for x in len(options): will produce an error as Python doesn't allow iteration over an integer. 200_success's approach is the way to go here, but for future reference, use for x in range(len(options)): if you really need to loop a certain number of times. This takes the len(options) integer and creates an interable out of it.
$endgroup$
– JDG
8 hours ago






$begingroup$
Side note: for x in len(options): will produce an error as Python doesn't allow iteration over an integer. 200_success's approach is the way to go here, but for future reference, use for x in range(len(options)): if you really need to loop a certain number of times. This takes the len(options) integer and creates an interable out of it.
$endgroup$
– JDG
8 hours ago












2 Answers
2






active

oldest

votes


















5












$begingroup$

The while True is fine, and is probably the best way to do it. However, the rest of the flow control is a bit clumsy. By rearranging a few statements, you can eliminate the continues.



PEP 8, the official Python style guide, recommends lowercase_with_underscores for function names unless you have a good reason to deviate.



The loop to print the numbered menu would be better written using enumerate(). Also, Python supports double-ended comparisons for validating that the answer is in range.



def multi_choice_question(options: list):

    while True:

        print("nEnter the number of your choice - ")

        for i, option in enumerate(options, 1):

            print('{0}. {1}'.format(i, option))

        print("n")

        try:

            answer = int(input())

            if 1 <= answer <= len(options):

                 return answer

            print("That option does not exist! Try again!")

        except ValueError:

            print("Doesn't seem like a number! Try again!")





share|improve this answer









$endgroup$









  • 2




    $begingroup$
    Is it standard now in python 3.x to use f-strings? print(f'{i}. {option}')
    $endgroup$
    – JDG
    9 hours ago








  • 2




    $begingroup$
    @JDG I wouldn't assume Python ≥ 3.6 if the question didn't specify it.
    $endgroup$
    – 200_success
    9 hours ago



















2












$begingroup$

I think that 200_success already covered most points. I would however like to add an alternative idea for the printing part:



print("Enter the number of your choice -",

    *(f'{i}. {opt}' for i, opt in enumerate(options, 1)),

    sep='n', end='nn')


Explanation:
from the docs we see that following signature for the print function:



 print(*objects, sep=' ', end='n', file=sys.stdout, flush=False)


we can therefore print everything with a single print call instead of three individual ones. I leave it up to you which one you perceive easier to use.






share|improve this answer









$endgroup$













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    2 Answers
    2






    active

    oldest

    votes








    2 Answers
    2






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    5












    $begingroup$

    The while True is fine, and is probably the best way to do it. However, the rest of the flow control is a bit clumsy. By rearranging a few statements, you can eliminate the continues.



    PEP 8, the official Python style guide, recommends lowercase_with_underscores for function names unless you have a good reason to deviate.



    The loop to print the numbered menu would be better written using enumerate(). Also, Python supports double-ended comparisons for validating that the answer is in range.



    def multi_choice_question(options: list):
    
    while True:
    
        print("nEnter the number of your choice - ")
    
        for i, option in enumerate(options, 1):
    
            print('{0}. {1}'.format(i, option))
    
        print("n")
    
        try:
    
            answer = int(input())
    
            if 1 <= answer <= len(options):
    
                 return answer
    
            print("That option does not exist! Try again!")
    
        except ValueError:
    
            print("Doesn't seem like a number! Try again!")





    share|improve this answer









    $endgroup$









    • 2




      $begingroup$
      Is it standard now in python 3.x to use f-strings? print(f'{i}. {option}')
      $endgroup$
      – JDG
      9 hours ago








    • 2




      $begingroup$
      @JDG I wouldn't assume Python ≥ 3.6 if the question didn't specify it.
      $endgroup$
      – 200_success
      9 hours ago
















    5












    $begingroup$

    The while True is fine, and is probably the best way to do it. However, the rest of the flow control is a bit clumsy. By rearranging a few statements, you can eliminate the continues.



    PEP 8, the official Python style guide, recommends lowercase_with_underscores for function names unless you have a good reason to deviate.



    The loop to print the numbered menu would be better written using enumerate(). Also, Python supports double-ended comparisons for validating that the answer is in range.



    def multi_choice_question(options: list):
    
    while True:
    
        print("nEnter the number of your choice - ")
    
        for i, option in enumerate(options, 1):
    
            print('{0}. {1}'.format(i, option))
    
        print("n")
    
        try:
    
            answer = int(input())
    
            if 1 <= answer <= len(options):
    
                 return answer
    
            print("That option does not exist! Try again!")
    
        except ValueError:
    
            print("Doesn't seem like a number! Try again!")





    share|improve this answer









    $endgroup$









    • 2




      $begingroup$
      Is it standard now in python 3.x to use f-strings? print(f'{i}. {option}')
      $endgroup$
      – JDG
      9 hours ago








    • 2




      $begingroup$
      @JDG I wouldn't assume Python ≥ 3.6 if the question didn't specify it.
      $endgroup$
      – 200_success
      9 hours ago














    5












    5








    5





    $begingroup$

    The while True is fine, and is probably the best way to do it. However, the rest of the flow control is a bit clumsy. By rearranging a few statements, you can eliminate the continues.



    PEP 8, the official Python style guide, recommends lowercase_with_underscores for function names unless you have a good reason to deviate.



    The loop to print the numbered menu would be better written using enumerate(). Also, Python supports double-ended comparisons for validating that the answer is in range.



    def multi_choice_question(options: list):
    
    while True:
    
        print("nEnter the number of your choice - ")
    
        for i, option in enumerate(options, 1):
    
            print('{0}. {1}'.format(i, option))
    
        print("n")
    
        try:
    
            answer = int(input())
    
            if 1 <= answer <= len(options):
    
                 return answer
    
            print("That option does not exist! Try again!")
    
        except ValueError:
    
            print("Doesn't seem like a number! Try again!")





    share|improve this answer









    $endgroup$



    The while True is fine, and is probably the best way to do it. However, the rest of the flow control is a bit clumsy. By rearranging a few statements, you can eliminate the continues.



    PEP 8, the official Python style guide, recommends lowercase_with_underscores for function names unless you have a good reason to deviate.



    The loop to print the numbered menu would be better written using enumerate(). Also, Python supports double-ended comparisons for validating that the answer is in range.



    def multi_choice_question(options: list):
    
    while True:
    
        print("nEnter the number of your choice - ")
    
        for i, option in enumerate(options, 1):
    
            print('{0}. {1}'.format(i, option))
    
        print("n")
    
        try:
    
            answer = int(input())
    
            if 1 <= answer <= len(options):
    
                 return answer
    
            print("That option does not exist! Try again!")
    
        except ValueError:
    
            print("Doesn't seem like a number! Try again!")






    share|improve this answer












    share|improve this answer



    share|improve this answer










    answered 11 hours ago









    200_success200_success

    130k16153419




    130k16153419








    • 2




      $begingroup$
      Is it standard now in python 3.x to use f-strings? print(f'{i}. {option}')
      $endgroup$
      – JDG
      9 hours ago








    • 2




      $begingroup$
      @JDG I wouldn't assume Python ≥ 3.6 if the question didn't specify it.
      $endgroup$
      – 200_success
      9 hours ago














    • 2




      $begingroup$
      Is it standard now in python 3.x to use f-strings? print(f'{i}. {option}')
      $endgroup$
      – JDG
      9 hours ago








    • 2




      $begingroup$
      @JDG I wouldn't assume Python ≥ 3.6 if the question didn't specify it.
      $endgroup$
      – 200_success
      9 hours ago








    2




    2




    $begingroup$
    Is it standard now in python 3.x to use f-strings? print(f'{i}. {option}')
    $endgroup$
    – JDG
    9 hours ago






    $begingroup$
    Is it standard now in python 3.x to use f-strings? print(f'{i}. {option}')
    $endgroup$
    – JDG
    9 hours ago






    2




    2




    $begingroup$
    @JDG I wouldn't assume Python ≥ 3.6 if the question didn't specify it.
    $endgroup$
    – 200_success
    9 hours ago




    $begingroup$
    @JDG I wouldn't assume Python ≥ 3.6 if the question didn't specify it.
    $endgroup$
    – 200_success
    9 hours ago













    2












    $begingroup$

    I think that 200_success already covered most points. I would however like to add an alternative idea for the printing part:



    print("Enter the number of your choice -",
    
    *(f'{i}. {opt}' for i, opt in enumerate(options, 1)),
    
    sep='n', end='nn')


    Explanation:
    from the docs we see that following signature for the print function:



     print(*objects, sep=' ', end='n', file=sys.stdout, flush=False)


    we can therefore print everything with a single print call instead of three individual ones. I leave it up to you which one you perceive easier to use.






    share|improve this answer









    $endgroup$


















      2












      $begingroup$

      I think that 200_success already covered most points. I would however like to add an alternative idea for the printing part:



      print("Enter the number of your choice -",
      
    *(f'{i}. {opt}' for i, opt in enumerate(options, 1)),
      
    sep='n', end='nn')


      Explanation:
      from the docs we see that following signature for the print function:



       print(*objects, sep=' ', end='n', file=sys.stdout, flush=False)


      we can therefore print everything with a single print call instead of three individual ones. I leave it up to you which one you perceive easier to use.






      share|improve this answer









      $endgroup$
















        2












        2








        2





        $begingroup$

        I think that 200_success already covered most points. I would however like to add an alternative idea for the printing part:



        print("Enter the number of your choice -",
        
    *(f'{i}. {opt}' for i, opt in enumerate(options, 1)),
        
    sep='n', end='nn')


        Explanation:
        from the docs we see that following signature for the print function:



         print(*objects, sep=' ', end='n', file=sys.stdout, flush=False)


        we can therefore print everything with a single print call instead of three individual ones. I leave it up to you which one you perceive easier to use.






        share|improve this answer









        $endgroup$



        I think that 200_success already covered most points. I would however like to add an alternative idea for the printing part:



        print("Enter the number of your choice -",
        
    *(f'{i}. {opt}' for i, opt in enumerate(options, 1)),
        
    sep='n', end='nn')


        Explanation:
        from the docs we see that following signature for the print function:



         print(*objects, sep=' ', end='n', file=sys.stdout, flush=False)


        we can therefore print everything with a single print call instead of three individual ones. I leave it up to you which one you perceive easier to use.







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered 5 hours ago









        magu_magu_

        4831519




        4831519






















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            格利澤436b

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            格利泽436b 太陽系外行星 太陽系外行星列表 艺术家笔下的格利泽436b 母恆星 母恆星 Gliese 436 星座 獅子座 赤經 ( α ) 11 h  42 m  11.0941 s [1] 赤緯 ( δ ) +26° 42′ 23.652″ [1] 距離 33.4 ly (10.2 pc) 光譜類型 M2.5 V [1] 軌道參數 半长轴 ( a ) 0.0291±0.0004 [2] AU 軌道離心率 ( e ) 0.150±0.012 [2] 公轉週期 ( P ) 2.643904±0.000005 [3] d (0.00723849 y) 軌道傾角 ( i ) 85.8 +0.21 −0.25 [3] ° 角距 ( θ ) 2.794 mas 近星點時間 ( T 0 ) 2,451,551.716 ±0.01 JD 半振幅 ( K ) 18.68±0.8 m/s 物理性质 质量 ( m ) 22.2±1.0 [2] M ⊕ 半徑 ( r ) 4.327±0.183 [2] [4] R ⊕ 密度 ( ρ ) 1.51 g cm -3 表面重力 ( g ) 1.18 g 溫度 ( T ) 712±36 [2] K 發現 發現時間 2004 發現者 巴特勒、沃格特、 馬西 et al. 發現方法 徑向速度、凌日法 發現地點 美國加利福尼亞州 發表論文 出版 其他名稱 Ross 905 b, GJ 436 b, [5] LTT 13213 b, GCTP 2704.10 b, LHS 310, AC+27:28217 b, Vyssotsky 616 b, HIP 57087 b, GEN# +9.80120068 b, LP 319-75 b, G 121-7 b, LSPM J1142+2642 b, 1RXS J114211.9+264328 b, ASCC 683818 b, G 147-68 b, UCAC2 41198281 b, BP...
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