Implement hands on hp-view-graph

hands_on/view_graph.py

@@ -0,0 +1,39 @@
+import os
+
+from exercise_utils.file import create_or_update_file, append_to_file
+from exercise_utils.git import add, init, commit
+
+__requires_git__ = True
+__requires_github__ = False
+
+
+def download(verbose: bool = False) -> None:
+    os.makedirs("things")
+    os.chdir("things")
+
+    # Initialize repository
+    init(verbose)
+
+    # Initial fruits file and commit
+    create_or_update_file(
+        "fruits.txt",
+        """
+        apples
+        bananas
+        cherries
+        dragon fruits
+        """,
+    )
+    add(["fruits.txt"], verbose)
+    commit("Add fruits.txt", verbose)
+
+    # Append figs, stage and commit
+    append_to_file("fruits.txt", "figs\n")
+    add(["fruits.txt"], verbose)
+    commit("Insert figs into fruits.txt", verbose)
+
+    # Add colours and shapes together and commit
+    create_or_update_file("colours.txt", "a file for colours\n")
+    create_or_update_file("shapes.txt", "a file for shapes\n")
+    add(["colours.txt", "shapes.txt"], verbose)
+    commit("Add colours.txt, shapes.txt", verbose)