Merge pull request #1 from dabeaz-course/master

morganpdx · web-flow · commit 1f710d5d5f9c · 2021-04-15T21:32:50.000-07:00
updating from master fork
diff --git a/Notes/02_Working_with_data/02_Containers.md b/Notes/02_Working_with_data/02_Containers.md
@@ -195,12 +195,14 @@ unique = set(names)
 Additional set operations:
 
 ```python
-names.add('CAT')        # Add an item
-names.remove('YHOO')    # Remove an item
-
-s1 | s2                 # Set union
-s1 & s2                 # Set intersection
-s1 - s2                 # Set difference
+unique.add('CAT')        # Add an item
+unique.remove('YHOO')    # Remove an item
+
+s1 = { 'a', 'b', 'c'}
+s2 = { 'c', 'd' }
+s1 | s2                 # Set union { 'a', 'b', 'c', 'd' }
+s1 & s2                 # Set intersection { 'c' }
+s1 - s2                 # Set difference { 'a', 'b' }
 ```
 
 ## Exercises
diff --git a/Notes/02_Working_with_data/03_Formatting.md b/Notes/02_Working_with_data/03_Formatting.md
@@ -115,7 +115,7 @@ modeled after the C `printf()` as well.
 *Note: This is the only formatting available on byte strings.*
 
 ```python
->>> b'%s has %n messages' % (b'Dave', 37)
+>>> b'%s has %d messages' % (b'Dave', 37)
 b'Dave has 37 messages'
 >>>
 ```
diff --git a/Notes/02_Working_with_data/06_List_comprehension.md b/Notes/02_Working_with_data/06_List_comprehension.md
@@ -215,7 +215,7 @@ For example, this determines the set of unique stock names that appear in `portf
 ```python
 >>> names = { s['name'] for s in portfolio }
 >>> names
-{ 'AA', 'GE', 'IBM', 'MSFT', 'CAT'] }
+{ 'AA', 'GE', 'IBM', 'MSFT', 'CAT' }
 >>>
 ```
 
