#-----------------------------------------------------------------
#By TrungVan, On 20210815
#ToDo   : how to use a module in python
#Reference links
#   https://www.w3schools.com/python/python_modules.asp
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# 1 module variables
num_of_functions = 2
# 2 module functions
def upper(name):
    return(name.upper())
def lower(name):
    return(name.lower())