$ LC_ALL=C sort file1
CtsDpiTestCases
CtsDpiTestCases2
$ LC_ALL=C sort file
CtsDpiTestCases Passed
CtsDpiTestCases2 Passed

var = None

Age = 21

If age < 21:

Elif age <= 21

#!/usr/bin/env python3
import sys


def checkAge(age):
    if age < 21:
        print("no beer for you")
    elif age == 21:
        print("barely made it")
    else:
        print("you can have your beer sir")


if len(sys.argv) != 2:
    print("This script requires a single input argument, the age.")
    sys.exit(1)
myAge = sys.argv[1]
if not myAge.isdigit():
    print("The age given must be a number.")
    sys.exit(1)
else:
    myAge = int(myAge)

checkAge(myAge)

$ foo.py 12
no beer for you
$ foo.py 21
barely made it
$ foo.py 22
you can have your beer sir

#!/usr/bin/env python3


def checkAge(age):
    if age < 21:
        print("no beer for you")
    elif age == 21:
        print("barely made it")
    else:
        print("you can have your beer sir")


myAge = int(input("Please enter something: "))
checkAge(myAge)

#!/usr/bin/env python3
age = int(input("Please enter something: "))
if age < 21:
    print("no beer for you")
elif age == 21:
    print("barely made it")
else:
    print("you can have your beer sir")

#!/usr/bin/env python3
age = int(input("Please enter something: "))
print(["no beer for you", "barely made it", "you can have your beer sir"][[age < 21, age ==21, age > 21].index(True)])