Triple nesting while loops Python 3.6.5 is not indefinite [duplicate]

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I am trying to do triple nesting of while loops.
If you input a decimal number it returns error, then if you input number above 31 it returns error, but if you try again to input decimal number code stops. Need help making it indefinite loop no matter how many times, or what order, a user inputs incorrect format. Also need to verify that dates input are valid for number of days in given month?

import string

varD= input("Enter Date/Day:")

while varD.isdigit() or varD.isspace()
or varD.isdecimal or int(varD)>31
or int(varD)==26 or int(varD)<=0:
print ("Error: Enter Valid Number!")
varD= input("Enter Day:")

else:
print ("You have entered:", varD)


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while True

1 Answer
1

Use an infinite loop and break only when all criteria are satisfied instead.

while True:
varD = input("Enter Day:")
if varD.isdigit() and not varD.isspace() and varD.isdecimal()
and int(varD) < 32 and int(varD) != 26 and int(varD) > 0:
break
print("Error: Enter Valid Number!")
print("You have entered: %s" % varD)


Also, your understanding of the term triple nesting is incorrect. Triple nesting means something like this:

while expression1:
while expression2:
while expression3:
do_something()


if

if