I'm making a class dataset. In it, I'm trying to set the minimum max and the mean. In my given test, I am asking the user to input as many grades as they would like so what I did, for example in minimum is this..

class Dataset(object):
    def __init__(self, grade):
        self.grade=[]
def min(self):
        try:
            if int(input)<= self.grade:
                return int(input)
        except:
            pass

using this test,

from Dataset import Dataset

def main():
    print('This is a program to compute the min, max, mean and')
    print('standard deviation for a set of numbers.\n')
    while True:
        xStr = input('Enter a number (<Enter> to quit): ')
        if xStr == '':
            break
        try:
            x = float(xStr)
        except ValueError:
            print('Invalid Entry Ignored: Input was not a number')
            continue
        data = Dataset(xStr)
        data.add(x)

    print('Min:', data.min())
    print('Max:', data.max())
    print('Mean:', data.average())
    print('Standard Deviation:', data.std_deviation())

if __name__ == '__main__':
    main()

which was given by the professor. The output is that there is no minimum. What am I doing wrong?

On first blush it could be an indentation error in your class.

sorry, I was actually deleting things in the class. But, its perfectly indented on my idle now.

class Dataset(object):
    def __init__(self, grade):
        self.grade=[]
    def min(self):
        try:
            if int(input)<= self.grade:
                return int(input)
        except:
            pass

Your concept looks strange, as you are anyway putting those in standard set. You initialize self.grade as empty list and it stays so, grade given to Dataset you ignore.