Python-AttributeError：“ str”对象没有属性“ isDigit”

Question

Here is my code

input = raw_input("Please enter a number")  
print input.isDigit()

when I feed in the input, 7 into the interpreter it throws the error:

AttributeError: 'str' object has no attribute 'isDigit'

This makes no sense since isDigit is a built in function and is for strings. I am using python 2.7 and I am using JetBrains Pycharm so could it be the IDE I'm using?

Answer 1

D must be in small letter( lowercase letter ).

print input.isdigit()

And don't use in-built keywords as variable names.

>>> inp = raw_input("Please enter a number: ")
Please enter a number: 5
>>> print inp.isdigit()
True

Answer 2

var= '10'
if(var.isdigit()):
    print "has only digits"
else:
    print "has something else"

you are using isdigit() method incorrectly, remember python is case sensitive and you must use lowercase d in isdigit().