Python Collection Basics

sets.py

#set
#------------------------------
#sets are sorted
#mutable like list

set([1,3,4])
type(set())
type({})

#add item in set
low_primes = {1,2,3}
low_primes.add(12)
low_primes.update({19, 4},{10,8})
#.remove() if values doesnt exist error
low_primes.remove(12)
#.discard() if value doesnt exit, it wont return error
low_primes.discard(12)

while(low_primes):
  print(low_primes.pop())
  
  
#set math
#  | or .union(*others) - all of the items from all of the sets
#  & or .intersection(*others) - all of the common items between all of the sets
#  - or .difference(*others) - all of the items in the first set that are not in the other sets
#  ^ or .symmetric_difference(other) - all of the items that are not shared by the two sets

set1 = set(range(10))
set2 = {1,2}
set1.union(set2)
set1 | set2

COURSES = {
    "Python Basics": {"Python", "functions", "variables",
                      "booleans", "integers", "floats",
                      "arrays", "strings", "exceptions",
                      "conditions", "input", "loops"},
    "Java Basics": {"Java", "strings", "variables",
                    "input", "exceptions", "integers",
                    "booleans", "loops"},
    "PHP Basics": {"PHP", "variables", "conditions",
                   "integers", "floats", "strings",
                   "booleans", "HTML"},
    "Ruby Basics": {"Ruby", "strings", "floats",
                    "integers", "conditions",
                    "functions", "input"}
}

def covers(single_parameter):
    empty_list = []
    for keys, values in COURSES.items():
        if single_parameter.union(values):
            empty_list.append(keys)
    return empty_list

def covers_all(single_parameter):
    new_empty_list = []
    for keys, values in COURSES.items():
        if single_parameter.issubset(values):
            new_empty_list.append(keys)
    return new_empty_list

tuples.py

#TUPLES
#----------------------------------
course_minutes = {"Python": 232, "Java": 345, "PHP": 343}

for course, minutes in course_minutes.items():
  print("{} is {} minutes long".format(course,minutes));
  
  
  for index, letter in enumerate("abcdefghj"):
    print("{}:{}".format(index + 1, letter))
    
def combo(iterable1,iterable2):
  tuple_list= []
  for idx in range(len(iterable1)):
    tuple_list.append((iterable1[idx],iterable2[idx]))
  return tuple_list