Python exec() sample code

Author: lpozo

python-exec/calculations.py

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+# calculations.py
+
+
+def add(a, b):
+    """Return the sum of two numbers.
+
+    Tests:
+        >>> add(5, 6)
+        11
+        >>> add(2.3, 5.4)
+        7.7
+        >>> add("2", 3)
+        Traceback (most recent call last):
+        TypeError: numeric type expected for "a" and "b"
+    """
+    if not (isinstance(a, (int, float)) and isinstance(b, (int, float))):
+        raise TypeError('numeric type expected for "a" and "b"')
+    return a + b
+
+
+# ...

python-exec/compiled_code.py

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+# compiled_code.py
+
+string_code = """
+def sum_of_even_squares(numbers):
+    return sum(number**2 for number in numbers if number % 2 == 0)
+
+print(sum_of_even_squares(numbers))
+"""
+
+compiled_code = compile(string_code, "<string>", "exec")
+exec(compiled_code)
+
+numbers = [2, 3, 7, 4, 8]
+exec(compiled_code)
+
+
+numbers = [5, 3, 9, 6, 1]
+exec(compiled_code)

python-exec/hello.py

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+# hello.py
+
+print("Hello, Pythonista!")
+print("Welcome to Real Python!")
+
+
+def greet(name="World"):
+    print(f"Hello, {name}!")

python-exec/settings.conf

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+font_face = ""
+font_size = 10
+line_numbers = True
+tab_size = 4
+auto_indent = True

python-exec/settings.py

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+# settings.py
+
+from pathlib import Path
+
+
+def load_config(config_file):
+    config_file = Path(config_file)
+    code = compile(config_file.read_text(), config_file.name, "exec")
+    config_dict = {}
+    exec(code, {"__builtins__": {}}, config_dict)
+    return config_dict

python-exec/string_based_code.py

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+code = """
+numbers = [2, 3, 7, 4, 8]
+
+def is_even(number):
+    return number % 2 == 0
+
+even_numbers = [number for number in numbers if is_even(number)]
+
+squares = [number**2 for number in even_numbers]
+
+result = sum(squares)
+
+print("Original data:", numbers)
+print("Even numbers:", even_numbers)
+print("Square values:", squares)
+print("Sum of squares:", result)
+"""
+
+exec(code)