aider: Fix undefined name 'Path' errors by importing the Path class from the pathlib module.

# Aider chat conversation:

USER: # Fix any errors below

## Running: flake8 --select=E9,F821,F823,F831,F406,F407,F701,F702,F704,F706 --show-source aider/coders/wholefile_coder.py

aider/coders/wholefile_coder.py:73:62: F821 undefined name 'Path'
                    if fname and fname not in chat_files and Path(fname).name in chat_files:
                                                             ^
aider/coders/wholefile_coder.py:74:33: F821 undefined name 'Path'
                        fname = Path(fname).name
                                ^
aider/coders/wholefile_coder.py:103:30: F821 undefined name 'Path'
                full_path = (Path(self.root) / fname).absolute()
                             ^
aider/coders/wholefile_coder.py:133:12: F821 undefined name 'Path'
        if Path(full_path).exists():
           ^

## See relevant lines below marked with █.

aider/coders/wholefile_coder.py:
...⋮...
  2│from aider import diffs
  3│
...⋮...
  9│class WholeFileCoder(Coder):
 10│    edit_format = "whole"
 11│
...⋮...
 30│    def get_edits(self, mode="update"):
 31│        content = self.partial_response_content
 32│
...⋮...
 44│        for i, line in enumerate(lines):
 45│            if line.startswith(self.fence[0]) or line.startswith(self.fence[1]):
 46│                if fname is not None:
 47│                    # ending an existing block
 48│                    saw_fname = None
 49│
 50│                    full_path = self.abs_root_path(fname)
 51│
 52│                    if mode == "diff":
 53│                        output += self.do_live_diff(full_path, new_lines, True)
 54│                    else:
 55│                        edits.append((fname, fname_source, new_lines))
 56│
...⋮...
 63│                if i > 0:
 64│                    fname_source = "block"
...⋮...
 70│                    # Did gpt prepend a bogus dir? It especially likes to
 71│                    # include the path/to prefix from the one-shot example in
 72│                    # the prompt.
 73█                    if fname and fname not in chat_files and Path(fname).name in chat_files:
 74█                        fname = Path(fname).name
 75│                if not fname:  # blank line? or ``` was on first line i==0
 76│                    if saw_fname:
 77│                        fname = saw_fname
...⋮...
100│        if mode == "diff":
101│            if fname is not None:
102│                # ending an existing block
103█                full_path = (Path(self.root) / fname).absolute()
104│                output += self.do_live_diff(full_path, new_lines, False)
105│            return "\n".join(output)
106│
...⋮...
130│            self.io.write_text(full_path, new_lines)
131│
132│    def do_live_diff(self, full_path, new_lines, final):
133█        if Path(full_path).exists():
134│            orig_lines = self.io.read_text(full_path).splitlines(keepends=True)
135│
136│            show_diff = diffs.diff_partial_update(
137│                orig_lines,
138│                new_lines,
139│                final=final,
140│            ).splitlines()
141│            output = show_diff
142│        else:
...⋮...

ASSISTANT: To fix the errors, we need to import the `Path` class from the `pathlib` module. Here are the necessary changes:

aider/coders/wholefile_coder.py
<source>python
<<<<<<< SEARCH
from aider import diffs
=======
from aider import diffs
from pathlib import Path
>>>>>>> REPLACE
</source>

aider/coders/wholefile_coder.py
<source>python
<<<<<<< SEARCH
                    if fname and fname not in chat_files and Path(fname).name in chat_files:
                        fname = Path(fname).name
=======
                    if fname and fname not in chat_files and Path(fname).name in chat_files:
                        fname = Path(fname).name
>>>>>>> REPLACE
</source>

aider/coders/wholefile_coder.py
<source>python
<<<<<<< SEARCH
                full_path = (Path(self.root) / fname).absolute()
=======
                full_path = (Path(self.root) / fname).absolute()
>>>>>>> REPLACE
</source>

aider/coders/wholefile_coder.py
<source>python
<<<<<<< SEARCH
        if Path(full_path).exists():
=======
        if Path(full_path).exists():
>>>>>>> REPLACE
</source>

aider/coders/wholefile_coder.py

@@ -1,5 +1,6 @@
 
 from aider import diffs
+from pathlib import Path
 
 from ..dump import dump  # noqa: F401
 from .base_coder import Coder