STYLE: Fix Pylint Style Checks For used-before-assignment

pandas/_version.py

@@ -72,8 +72,8 @@ def run_command(commands, args, cwd=None, verbose=False, hide_stderr=False, env=
     assert isinstance(commands, list)
     p = None
     for c in commands:
+        dispcmd = str([c] + args)
         try:
-            dispcmd = str([c] + args)
             # remember shell=False, so use git.cmd on windows, not just git
             p = subprocess.Popen(
                 [c] + args,

pandas/core/dtypes/common.py

@@ -266,7 +266,7 @@ def is_scipy_sparse(arr) -> bool:
     """
     global _is_scipy_sparse
 
-    if _is_scipy_sparse is None:
+    if _is_scipy_sparse is None:  # pylint: disable=used-before-assignment
         try:
             from scipy.sparse import issparse as _is_scipy_sparse
         except ImportError:

pandas/core/groupby/indexing.py

@@ -112,7 +112,9 @@ def _positional_selector(self) -> GroupByPositionalSelector:
         4  b  5
         """
         if TYPE_CHECKING:
-            groupby_self = cast(groupby.GroupBy, self)
+            groupby_self = cast(
+                groupby.GroupBy, self  # pylint: disable=used-before-assignment
+            )
         else:
             groupby_self = self
 

pandas/core/tools/datetimes.py

@@ -1074,8 +1074,9 @@ def to_datetime(
         exact=exact,
         infer_datetime_format=infer_datetime_format,
     )
-
+    # pylint: disable=used-before-assignment
     result: Timestamp | NaTType | Series | Index
+    # pylint: enable=used-before-assignment
 
     if isinstance(arg, Timestamp):
         result = arg

pandas/io/formats/style.py

@@ -82,15 +82,14 @@
     has_mpl = True
 except ImportError:
     has_mpl = False
-    no_mpl_message = "{0} requires matplotlib."
 
 
 @contextmanager
 def _mpl(func: Callable) -> Generator[tuple[Any, Any], None, None]:
     if has_mpl:
         yield plt, mpl
     else:
-        raise ImportError(no_mpl_message.format(func.__name__))
+        raise ImportError(f"{func.__name__} requires matplotlib.")
 
 
 ####

pandas/tests/io/excel/test_writers.py

@@ -883,10 +883,9 @@ def test_to_excel_unicode_filename(self, ext):
         with tm.ensure_clean("\u0192u." + ext) as filename:
             try:
                 f = open(filename, "wb")
+                f.close()
             except UnicodeEncodeError:
                 pytest.skip("No unicode file names on this system")
-            finally:
-                f.close()
 
             df = DataFrame(
                 [[0.123456, 0.234567, 0.567567], [12.32112, 123123.2, 321321.2]],

pandas/tests/io/pytables/test_store.py

@@ -877,13 +877,13 @@ def test_copy():
     with catch_warnings(record=True):
 
         def do_copy(f, new_f=None, keys=None, propindexes=True, **kwargs):
-            try:
-                store = HDFStore(f, "r")
+            if new_f is None:
+                import tempfile
 
-                if new_f is None:
-                    import tempfile
+                fd, new_f = tempfile.mkstemp()
 
-                    fd, new_f = tempfile.mkstemp()
+            try:
+                store = HDFStore(f, "r")
                 tstore = store.copy(new_f, keys=keys, propindexes=propindexes, **kwargs)
 
                 # check keys

pyproject.toml

@@ -63,7 +63,6 @@ disable = [
   "unsubscriptable-object",
   "unsupported-assignment-operation",
   "unsupported-membership-test",
-  "used-before-assignment",
 ]
 
 [tool.pytest.ini_options]

versioneer.py

@@ -385,8 +385,8 @@ def run_command(commands, args, cwd=None, verbose=False, hide_stderr=False, env=
     assert isinstance(commands, list)
     p = None
     for c in commands:
+        dispcmd = str([c] + args)
         try:
-            dispcmd = str([c] + args)
             # remember shell=False, so use git.cmd on windows, not just git
             p = subprocess.Popen(
                 [c] + args,