Rename lists to lists.py

python/lists.py

@@ -0,0 +1,54 @@
+# LISTS
+
+# use square brackets to get one item of a list using index.
+# note that first item has index 0. 
+# to get that first item, 67, scores[0]
+scores = [67, 32, 29]
+print(scores[2])
+
+print()  # print blank line
+
+# sum is a function built into python lists. 
+# if all items in the list are numeric it will add them up.
+# len gives you the number of items in the list, here 3 items.
+print(sum(scores))
+print(len(scores))
+
+print()
+
+# USING A FOR LOOP TO ITERATE A LIST
+# our variable for the list is scores
+# we use score as a variable for list iteration.
+# each time through the loop, score takes on the next value in the list
+for score in scores:
+  if score % 2 == 0:    # % is called mod, and gives you the remainder of a division
+    print(score, ' is even.')
+
+print()
+
+names = ["Alice", "Tina", "Berta"]
+
+# SORTING A LIST
+print(sorted(names))
+
+# ITERATE A LIST TO FIND NAMES THAT CONTAIN C
+for name in names:
+  if 'c' in name:
+    print(name, ' contains a c')
+
+print()
+
+# add an item to a list
+names.append('Jenny')
+print(names)
+
+# delete Tina from the list
+names.remove('Tina')
+print(names)
+
+print()
+
+# list inside a list
+scores.append([100, 103])
+print(scores)
+print(scores[3][0])