---
source: crates/ruff_python_formatter/tests/fixtures.rs
input_file: crates/ruff_python_formatter/resources/test/fixtures/black/simple_cases/comments3.py
---
## Input

```py
# The percent-percent comments are Spyder IDE cells.


# %%
def func():
    x = """
    a really long string
    """
    lcomp3 = [
        # This one is actually too long to fit in a single line.
        element.split("\n", 1)[0]
        # yup
        for element in collection.select_elements()
        # right
        if element is not None
    ]
    # Capture each of the exceptions in the MultiError along with each of their causes and contexts
    if isinstance(exc_value, MultiError):
        embedded = []
        for exc in exc_value.exceptions:
            if exc not in _seen:
                embedded.append(
                    # This should be left alone (before)
                    traceback.TracebackException.from_exception(
                        exc,
                        limit=limit,
                        lookup_lines=lookup_lines,
                        capture_locals=capture_locals,
                        # copy the set of _seen exceptions so that duplicates
                        # shared between sub-exceptions are not omitted
                        _seen=set(_seen),
                    )
                    # This should be left alone (after)
                )

    # everything is fine if the expression isn't nested
    traceback.TracebackException.from_exception(
        exc,
        limit=limit,
        lookup_lines=lookup_lines,
        capture_locals=capture_locals,
        # copy the set of _seen exceptions so that duplicates
        # shared between sub-exceptions are not omitted
        _seen=set(_seen),
    )


# %%
```

## Black Differences

```diff
--- Black
+++ Ruff
@@ -6,43 +6,16 @@
     x = """
     a really long string
     """
-    lcomp3 = [
-        # This one is actually too long to fit in a single line.
-        element.split("\n", 1)[0]
-        # yup
-        for element in collection.select_elements()
-        # right
-        if element is not None
-    ]
+    lcomp3 = [i for i in []]
     # Capture each of the exceptions in the MultiError along with each of their causes and contexts
-    if isinstance(exc_value, MultiError):
+    if NOT_IMPLEMENTED_call(NOT_IMPLEMENTED_arg):
         embedded = []
         for exc in exc_value.exceptions:
             if exc not in _seen:
-                embedded.append(
-                    # This should be left alone (before)
-                    traceback.TracebackException.from_exception(
-                        exc,
-                        limit=limit,
-                        lookup_lines=lookup_lines,
-                        capture_locals=capture_locals,
-                        # copy the set of _seen exceptions so that duplicates
-                        # shared between sub-exceptions are not omitted
-                        _seen=set(_seen),
-                    )
-                    # This should be left alone (after)
-                )
+                NOT_IMPLEMENTED_call(NOT_IMPLEMENTED_arg)
 
     # everything is fine if the expression isn't nested
-    traceback.TracebackException.from_exception(
-        exc,
-        limit=limit,
-        lookup_lines=lookup_lines,
-        capture_locals=capture_locals,
-        # copy the set of _seen exceptions so that duplicates
-        # shared between sub-exceptions are not omitted
-        _seen=set(_seen),
-    )
+    NOT_IMPLEMENTED_call(NOT_IMPLEMENTED_arg)
 
 
 # %%
```

## Ruff Output

```py
# The percent-percent comments are Spyder IDE cells.


# %%
def func():
    x = """
    a really long string
    """
    lcomp3 = [i for i in []]
    # Capture each of the exceptions in the MultiError along with each of their causes and contexts
    if NOT_IMPLEMENTED_call(NOT_IMPLEMENTED_arg):
        embedded = []
        for exc in exc_value.exceptions:
            if exc not in _seen:
                NOT_IMPLEMENTED_call(NOT_IMPLEMENTED_arg)

    # everything is fine if the expression isn't nested
    NOT_IMPLEMENTED_call(NOT_IMPLEMENTED_arg)


# %%
```

## Black Output

```py
# The percent-percent comments are Spyder IDE cells.


# %%
def func():
    x = """
    a really long string
    """
    lcomp3 = [
        # This one is actually too long to fit in a single line.
        element.split("\n", 1)[0]
        # yup
        for element in collection.select_elements()
        # right
        if element is not None
    ]
    # Capture each of the exceptions in the MultiError along with each of their causes and contexts
    if isinstance(exc_value, MultiError):
        embedded = []
        for exc in exc_value.exceptions:
            if exc not in _seen:
                embedded.append(
                    # This should be left alone (before)
                    traceback.TracebackException.from_exception(
                        exc,
                        limit=limit,
                        lookup_lines=lookup_lines,
                        capture_locals=capture_locals,
                        # copy the set of _seen exceptions so that duplicates
                        # shared between sub-exceptions are not omitted
                        _seen=set(_seen),
                    )
                    # This should be left alone (after)
                )

    # everything is fine if the expression isn't nested
    traceback.TracebackException.from_exception(
        exc,
        limit=limit,
        lookup_lines=lookup_lines,
        capture_locals=capture_locals,
        # copy the set of _seen exceptions so that duplicates
        # shared between sub-exceptions are not omitted
        _seen=set(_seen),
    )


# %%
```