Annotate programs as copyable

Author: alexmojaki

backend/main/chapters/c03_variables.py

@@ -185,7 +185,7 @@ class editor_hello_world(VerbatimStep):
         """
 It's time to stop doing everything in the shell. In the top right you can see the *editor*. This is a place where you can write and run longer programs. The shell is great and you should keep using it to explore, but the editor is where real programs live.
 
-Copy the program below into the editor, then click the 'Run' button:
+Type the program below into the editor, then click the 'Run' button:
 
     __program_indented__
         """

backend/main/chapters/c05_if_statements.py

@@ -191,7 +191,8 @@ class print_tail(print_tail_base):
         """
 Run this program:
 
-__program_indented__
+    __copyable__
+    __program_indented__
         """
 
     class print_tail_snoop(print_tail_base):
@@ -348,6 +349,7 @@ class undefined_char(VerbatimStep):
         """
 Here's a broken program:
 
+    __copyable__
     sentence = 'Hello World'
     excited = True
 
@@ -526,7 +528,8 @@ class if_equals_replacing_characters(VerbatimStep):
         """
 Let's use `==` in an `if` statement. In this program, the `if` body runs only when `c` is the character `'s'`. See for yourself.
 
-__program_indented__
+    __copyable__
+    __program_indented__
         """
 
         def program(self):
@@ -593,7 +596,8 @@ class dna_example(VerbatimStep):
 
 We're going to repeat that process. Let's try the same kind of program we just wrote:
 
-__program_indented__
+    __copyable__
+    __program_indented__
         """
 
         def program(self):
@@ -782,7 +786,8 @@ class brokn_kyboard(VerbatimStep):
         """
 Here's a cute little program using `!=`:
 
-__program_indented__
+    __copyable__
+    __program_indented__
         """
 
         def program(self):

backend/main/chapters/c06_lists.py

@@ -178,6 +178,7 @@ class double_numbers(ExerciseStep):
 You can also create an empty list that has no elements.
 Check for yourself:
 
+    __copyable__
     numbers = [1, 2] + [3, 4]
     print(numbers)
     new_numbers = []
@@ -966,6 +967,7 @@ class run_with_python_tutor(VerbatimStep):
 There you can navigate through the program step by step with the "Prev" or "Next" buttons, or drag
 the slider left or right. You can also see the values of variables on the right.
 
+    __copyable__
     __program_indented__
         """
 
@@ -1000,7 +1002,8 @@ class two_separate_lists(VerbatimStep):
 It's time to learn some technical details that are often misunderstood and lead to errors.
 Run this program:
 
-__program_indented__
+    __copyable__
+    __program_indented__
         """
 
         def program(self):
@@ -1087,7 +1090,8 @@ class run_broken_with_python_tutor(VerbatimStep):
 Consider this program. It loops through a list of numbers and removes the ones smaller than 10. Or at least, it tries to.
 Run it with Python Tutor.
 
-__program_indented__
+    __copyable__
+    __program_indented__
 
 (remember that `numbers.pop(i)` removes the element from `numbers` at index `i`)
         """

backend/main/chapters/c07_nested_loops.py

@@ -689,7 +689,8 @@ class first_birdseye_example(VerbatimStep):
 
 Here's an example program to run. Copy it into the editor and click the Bird's Eye button. This will open a new browser tab with the visualisation.
 
-__program_indented__
+    __copyable__
+    __program_indented__
         """
 
         expected_code_source = "birdseye"
@@ -727,7 +728,8 @@ class birdseye_loop_example(VerbatimStep):
 
 Here's a more complicated example to try out:
 
-__program_indented__
+    __copyable__
+    __program_indented__
         """
 
         expected_code_source = "birdseye"

backend/main/chapters/c09_boolean operators.py

@@ -21,7 +21,8 @@ class InputAliceBob(VerbatimStep):
 The function below accepts one parameter, `name`, and checks if the person with the given name is among your friends.
 Copy and run the code in the editor:
 
-__program_indented__
+    __copyable__
+    __program_indented__
         """
         def program(self):
             def is_friend(name):
@@ -227,6 +228,7 @@ class AnExercise(ExerciseStep):
 It should return `True` if `x` is between 0 and 100 (inclusive), and return `False` otherwise.
 Your function should use `or`, and pass these tests:
 
+    __copyable__
     assert_equal(is_valid_percentage(-1), False)
     assert_equal(is_valid_percentage(0), True)
     assert_equal(is_valid_percentage(50), True)
@@ -312,6 +314,7 @@ class AndExercise(ExerciseStep):
 Let's practice now. Previously we wrote a function `is_valid_percentage` using `or`. Here's an example
 solution:
 
+    __copyable__
     def is_valid_percentage(x):
         if x < 0 or x > 100:
             return False
@@ -389,6 +392,7 @@ def is_valid_percentage(x):
 
 Next exercise: given a list of three elements, check if all three elements are equal.
 
+    __copyable__
     def all_equal(row):
         ...
 
@@ -478,7 +482,8 @@ class valid_multiline(VerbatimStep):
 
 Here are some examples. Pay close attention to the details.
 
-__program_indented__
+    __copyable__
+    __program_indented__
         """
 
         def program(self):
@@ -553,6 +558,7 @@ class AndHasHigherPriority(ExerciseStep):
 Write a function to check if someone has won a game by placing 3 of the same pieces on one of the diagonal lines.
 The board is given as 3 lists of 3 strings each, and the function should return a boolean.
 
+    __copyable__
     def diagonal_winner(row1, row2, row3):
         ...
 
@@ -720,6 +726,7 @@ class NotPriority(ExerciseStep):
 Suppose that .png and .jpg files cannot be processed, but other file types can.
 Here's an example function to do that:
 
+    __copyable__
     def invalid_image(filename):
         if filename.endswith(".png") or filename.endswith(".jpg"):
             return False

backend/main/text.py

@@ -168,6 +168,7 @@ def __init__(cls, *args, **kwargs):
         cls.final_text = highlighted_markdown(cls.final_text.strip())
         cls.step_names.append("final_text")
         cls.step_texts.append(cls.final_text)
+        assert "__copyable__" not in str(cls.step_texts)
 
     @property
     def slug(cls):