Differences

This shows you the differences between two versions of the page.

--- python:workout [2026/02/27 08:21] – created v1ctor
+++ python:workout [2026/03/24 11:31] (current) – [GEERATORS] v1ctor
@@ Line 3: / Line 3: @@
 ==== SPLAT OPERATOR ====
-Splat operator (aka "*****") allows a function to receive any number or arguments.
+Splat operator (aka ''*'') allows a function to receive any number or arguments.
+<code python>
+def mysum(*numbers):
+    print(type(numbers))  # tuple
+mysum(1,2,3,4,5)     # passing arbitrary number of arguments
+mysum(*[2,3,4,5,6])  # unpacking an iterable
+</code>
+==== GEERATORS ====
+A generator expression looks just like a list comprehension but with parentheses instead of brackets:
+<code python>
+# List comprehension — builds a list
+[some_func(w) for w in s.split()]
+# Generator expression — produces values lazily
+(some_func(w) for w in s.split())
+</code>
+When you pass a generator directly as the only argument to a function, you can drop the extra parentheses:
+<code python>
+" ".join(some_func(w) for w in s.split())    # parens omitted (cleaner)
+</code>