Clarify casting and move bool() method section

1 files changed, 14 insertions, 2 deletions

diff --git a/python.html.markdown b/python.html.markdown
index e8c7110a..0b115c4e 100644
--- a/python.html.markdown
+++ b/python.html.markdown
@@ -85,12 +85,24 @@ False - 5   # => -5
 2 == True   # => False
 -5 != False # => True
 
-# Using boolean logical operators on ints casts them to booleans for evaluation, but their non-cast value is returned
-# Don't mix up with bool(ints) and bitwise and/or (&,|)
+# None, 0, and empty strings/lists/dicts/tuples/sets all evaluate to False.
+# All other values are True
 bool(0)     # => False
+bool("")    # => False
+bool([])    # => False
+bool({})    # => False
+bool(())    # => False
+bool(set()) # => False
 bool(4)     # => True
 bool(-6)    # => True
+
+# Using boolean logical operators on ints casts them to booleans for evaluation, but their non-cast value is returned
+# Don't mix up with bool(ints) and bitwise and/or (&,|)
+bool(0)     # => False
+bool(2)     # => True
 0 and 2     # => 0
+bool(-5)    # => True
+bool(2)     # => True
 -5 or 0     # => -5
 
 # Equality is ==