primeiro commit com exercicios de Exercism realizados até esta data

python/locomotive-engineer/HINTS.md

@@ -0,0 +1,34 @@
+# Hints
+
+## General
+
+- To extract multiple arguments in the function parameters so can you pack them with the `*args` operator for `list` or `tuples` or `**kwargs` for keyword-based arguments.
+- To pack or unpack use the `*` or `**` operator.
+
+## 1. Create a list of all wagons
+
+- Multiple arguments in the function parameters can be packed with the `*args` operator.
+
+## 2. Fix list of wagons
+
+- Using unpacking with the `*` operator, lets you extract the first two elements of a `list` while keeping the rest intact.
+- To add another `list` into an existing `list`, you can use the `*` operator to "spread" the `list`.
+
+## 3. Add missing stops
+
+- Using `**kwargs` as a function parameter will allow an arbitrary number of keyword arguments to be passed.
+- Using `**<dict>` as an argument will unpack a dictionary into keyword arguments.
+- You can put keyword arguments in a `{}` or `dict()`.
+- To get the values out of a dictionary, you can use the `<dict>.values()` method.
+
+## 4. Extend routing information
+
+- Using `**<dict>` as an argument will unpack a dictionary into keyword arguments.
+- You can put keyword arguments in a `{}` or `dict()`.
+
+## 5. Fix the wagon depot
+
+- `zip(*iterators)` can use used to transpose a nested `list`.
+- To extract data from zipped iterators, you can use a for loop.
+- you can also unpack zipped iterators using `*`.  
+  `[*content] = zip(iterator_1, iterator_2)` will unzip the `tuple` produced by `zip()` into a `list`.