Create tutorial_31.py

simply-coded · web-flow · commit 796818050a1f · 2017-06-13T12:34:37.000-05:00
diff --git a/code/tutorial_31.py b/code/tutorial_31.py
@@ -0,0 +1,66 @@
+names = ['mark', 'nia', 'kate', 'jenny', 'kate']
+scores = [90, 80, 65, 87, 90, 60, 68, 78, 91, 90, 63, 64]
+
+index = 3
+
+def nth_index(lst, occur, search_for):            
+    curr_i = 0
+    for x in range(occur):
+        curr_i = lst.index(search_for, curr_i)
+        index = curr_i
+        curr_i += 1    
+    return index
+
+# call my method and get the result
+found_i = nth_index(names, 2, 'kate')
+
+# you get to choose whether or not to override index
+index = found_i
+
+# use the information that my method returned
+names[index] = 'katy'
+
+# returning different values depending on the situation
+def birthday(age):
+    if is_dead:
+        return age    
+    return (age + 1)
+
+# test the function
+is_dead = False
+print( birthday(87) )
+
+is_dead = True
+# test the alternative result
+print( birthday(87) )
+
+# return None to stop a function
+def greet(name):
+    if name not in names:
+        return
+    print('Welcome,', name)
+
+
+# this will not display anything
+greet('jeremy')
+
+# this will display the greeting
+greet('nia')
+
+# return multiple values
+def is_div(num, div1, div2):    
+    res1 = num % div1 == 0
+    res2 = num % div2 == 0
+    return res1, res2 
+        
+# return them both into one variable
+result = is_div(80, 4, 3)
+
+is_div_by4 = result[0]
+is_div_by2 = result[1]
+
+# unpack tuple into variables
+is_div_by21, is_div_by5 = is_div(106510, 21, 5)
+
+# split before returning
+is_div_by9 = is_div(540, 3, 9)[-1]
