removed 1st edition code

17-it-generator/tree/extra/pretty_tree.py

@@ -1,31 +0,0 @@
-from tree import tree
-
-SPACES = ' ' * 4
-HLINE = '\u2500'            # ─ BOX DRAWINGS LIGHT HORIZONTAL
-HLINE2 = HLINE * 2
-ELBOW = f'\u2514{HLINE2} '  # └ BOX DRAWINGS LIGHT UP AND RIGHT
-TEE   = f'\u251C{HLINE2} '  # ├ BOX DRAWINGS LIGHT VERTICAL AND RIGHT
-PIPE  = f'\u2502   '        # │ BOX DRAWINGS LIGHT VERTICAL
-
-
-def render_lines(tree_iter):
-    name, _, _ = next(tree_iter)
-    yield name
-    prefix = ''
-
-    for name, level, last in tree_iter:
-        if last:
-            connector = ELBOW
-        else:
-            connector = TEE
-
-        prefix = prefix[:4 * (level-1)]
-        prefix = prefix.replace(TEE, PIPE).replace(ELBOW, SPACES)
-        prefix += connector
-
-        yield prefix + name
-
-
-if __name__ == '__main__':
-    for line in render_lines(tree(BaseException)):
-        print(line)