Add lists and sets examples

Author: TaylorHuston

Diff for: Python3/flowControl.py

@@ -35,10 +35,16 @@
     sum += x
 print(sum)
 
-myStr = "test"  #Also works for lists
+#String iteration, also works for lists
+myStr = "test" 
 for c in myStr:
     print(c)
 
+#This also works, just not considered "good python"
+for i in range(len(myStr)):
+    print(myStr[i])
+
+
 
 for x in range(0, 10):
     pass  #Loops and If Statements require a block, pass can be used as a placeholder

Diff for: Python3/lists.py

@@ -30,17 +30,18 @@
 print(myList1[2]) #34234
 
 cars = ['bmw', 'audi', 'toyota', 'subaru']
-cars.sort()
+cars.sort() #mutates
 print(cars) #['audi', 'bmw', 'subaru', 'toyota']
 
 cars.sort(reverse=True)
 print(cars) #['toyota', 'subaru', 'bmw', 'audi']
 
-print(sorted(cars))#['audi', 'bmw', 'subaru', 'toyota']
+print(sorted(cars))#['audi', 'bmw', 'subaru', 'toyota'] does not mutate
 print(cars) #['toyota', 'subaru', 'bmw', 'audi']
 
 cars = ['bmw', 'audi', 'toyota', 'subaru']
 print(cars)
+print(cars[-1]) #subaru
 
 cars.reverse()
 print(cars) #['subaru', 'toyota', 'audi', 'bmw']
@@ -53,4 +54,55 @@
 digits = [1, 2, 3, 4, 5, 6, 7, 8, 9, 0]
 print(min(digits)) #0
 print(max(digits)) #9
-print(sum(digits)) #45
+print(sum(digits)) #45
+
+print(digits[0:3]) #[1, 2, 3]
+print(digits[:3]) #[1, 2, 3]
+print(digits[3:]) #[4, 5, 6, 7, 8, 9, 0]
+print(digits[-3:]) #[8, 9, 0]
+print(digits[0:10:2]) #[1, 3, 5, 7, 9]
+print(digits[::-1]) #[0, 9, 8, 7, 6, 5, 4, 3, 2, 1] clever, but kind of hideous
+
+digits2 = digits #Copies reference, not values
+digits3 = digits.copy() #Copies values, not reference
+
+print(digits == digits2) #True
+print(digits == digits3) #True
+print(digits is digits2) #True
+print(digits is digits3) #False
+
+for i,e in enumerate(digits):
+    print(f"digits[{i}] = {e}")
+
+
+#Tuples and Dictionaries
+myTuple = (123131, 12321321, 1231) #tuples are not mutable
+print(myTuple) #(123131, 12321321, 1231)
+print(myTuple[1]) #12321321
+print(type(myTuple)) #<class 'tuple'>
+
+myDict = {'Name' : 'Tom', 'Height': 6.2}
+print(myDict)  #{'Name': 'Tom', 'Height': 6.2}
+print(myDict['Name'])  #Tom
+myDict['Name'] = "Jerry"
+print(myDict['Name'])  #Jerry
+
+myDict.clear()
+print(myDict) #{}
+del myDict
+#print(myDict)  this will throw an error
+
+#Sets
+set1= {1,1,2,3,5,6,5}
+print(set1) #{1, 2, 3, 5, 6}
+
+set2 = {27,5,55,41,2}
+print(set1.intersection(set2)) #{2, 5}
+print(set1.union(set2)) #{1, 2, 3, 5, 6, 41, 55, 27}
+print(set1.difference(set2)) #{1, 3, 6}
+
+print(type(())) #<class 'tuple'>
+print(type({})) #<class 'dict'>
+print(type(set())) #<class 'set'>
+
+

Diff for: Python3/strings.py

@@ -8,6 +8,9 @@
 print(str1.replace("some", "another")) #another string
 print(str1.isupper()) #False
 print(str1.islower()) #True
+print(str1.find("string")) #5
+print(str1.find("foo")) #-1
+print("some" in str1) #True
 
 #f-strings
 first_name = "john"

Diff for: Python3/variables.py

@@ -37,24 +37,6 @@
 str3 = str(num1)
 print(type(str3)) #<class 'str'>
 
-#Tuples and Dictionaries
-myTuple = (123131, 12321321, 1231) #tuples are not mutable
-print(myTuple) #(123131, 12321321, 1231)
-print(myTuple[1]) #12321321
-print(type(myTuple)) #<class 'tuple'>
-
-myDict = {'Name' : 'Tom', 'Height': 6.2}
-print(myDict)  #{'Name': 'Tom', 'Height': 6.2}
-print(myDict['Name'])  #Tom
-myDict['Name'] = "Jerry"
-print(myDict['Name'])  #Jerry
-
-myDict.clear()
-print(myDict) #{}
-del myDict
-#print(myDict)  this will throw an error
-
-
 
 
 #Constant