CODEWITHSUNDEEP
pythonif-statement
user10490126
user10490126

Reputation:

python assignment in print

I need to code in python in order to select or not select some employees for a pension program. I will be selecting on the basis of age and nationality So I don't want to select an employee whose age and nationality don't meet some criteria.

I can create a simple if statement and then print out qualified or disqualified, based on my data.

The catch is that I need to print a line which states that the person was disqualified because of being too young or old. How do I assign the criteria the employee has missed in my if statement? If I want to write a statement like this: The employee is not selected because the person doesn't fulfil the criteria: for example, too tall and underweight. How do I insert those in that statement?

Upvotes: 0

Views: 262

Answers (1)

Patrick Artner
Patrick Artner

Reputation: 51683

You can simply chain if: elif: - you would have to get creative if multiple "why not's" come together - or you can leverage some functions and list-comprehensions to deal with it.

You can create a check-function for each value thats returns you True if its ok, else False and a error message if its out of bounds:

# generic checker function
def check(param, min_val, max_val, min_val_error,max_val_error):
    """Checks 'param' agains 'min_val' and 'max_val'. Returns either
    '(True,None)' or '(False, correct_error_msg)' if param is out of bounds"""
    if min_val <= param <= max_val:
        return (True,None)  # all ok

    # return the correct error msg  (using a ternary expression)
    return (False, min_val_error if param < min_val else max_val_error)

# concrete checker for age. contains min/max values and error messages to use for age
def check_age(age):
    return check(age,20,50,"too young","too old")

# concrete checker for height, ... 
def check_height(height):
    return check(height,140,195,"too short","too long")

# concrete checker for weight, ...
def check_weight(weight):
    return check(weight,55,95,"too thin","too heavy")

Apply function to some test data:

# 3 test cases, one all below, one all above, one ok - tuples contain (age,height,weight)
for age,height,weight in [ (17,120,32),(99,201,220),(30,170,75)]:
    # create data
    # tuples comntain the thing to check (f.e. age) and what func to use (f.e. check_age)
    data = [ (age,check_age), (height,check_height), (weight,check_weight)]

    print(f"Age: {age}  Height: {height}  Weight: {weight}")
    # use print "Age: {}  Height: {}  Weight: {}".format(age,height,weight) for 2.7

    # get all tuples from data and call the func on the p - this checks all rules
    result = [ func(p) for p,func in data]

    # if all rule-results return (True,_) you are fine
    if all(  r[0] for r in result ):
        print("All fine")
    else:
        # not all are (True,_) - print those that are (False,Message)
        for r in result:
            if not r[0]:
                print(r[1])
                # use print r[1] for python 2.7

Output:

Age: 17  Height: 120  Weight: 32
too young
too short
too thin

Age: 99  Height: 201  Weight: 220
too old
too long
too heavy

Age: 30  Height: 170  Weight: 75
All fine

Readup:

Upvotes: 2

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