"""

Farhan Javed

farhan.javed47@gmail.com

12/30/2019

Part 2 of built in functions in the Python standard library

"""

def filterFunc(x):

if x % 2:

return True

return False

def filterFunc2(x):

if x.isupper():

return False

return True

def squareFunc(x):

return pow(x, 2)

def toGrade(x):

if x >= 90:

return 'A'

elif x >= 80:

return 'B'

elif x >= 70:

return 'C'

elif x >= 60:

return 'D'

elif x >= 50:

return 'E'

return 'F'

def main():

nums = (1, 8, 45, 11, 221, 57, 72, 89, 92)

chars = 'abCDEFghIJKlMNopQRstuvWXyz'

grades = (81, 89, 52, 12, 65, 99, 72, 25, 44, 33)

# TODO : use filter to remove even numbers from a list

odds = list(filter(filterFunc, nums))

print(sorted(odds))

odds_alt = [filterFunc(x) for x in nums]

print(sorted(odds_alt)) # generate a list of booleans using list comprehension

# TODO : use filter on non-numeric sequences

lowers = list(filter(filterFunc2, chars))

print(lowers)

# TODO : use map to create a new sequence of values after applying a given function to each item

squares = list(map(squareFunc, nums))

print(sorted(squares))

squares_alt = [pow(i, 2) for i in nums]

print(sorted(squares_alt)) # can use list comprehension to achieve the same..

# TODO : use sorted and map to convert marks into alphabetical grades

grades = sorted(grades)

letter_grades = list(map(toGrade, grades))

print(letter_grades)

if __name__ == '__main__': main()