Fixing pandas v2.1.0 compatibility (#126)

* added constructor_from_mgr function

CHANGELOG.md

@@ -1,5 +1,10 @@
 # TFS-Pandas Changelog
 
+## Version 3.7.2
+
+- Fixed:
+    - fixing the issues with `pandas` >= `v2.1.0` (see `tfs-pandas` `v3.7.1`) by overwriting the `_constructor_from_mgr` function.  
+
 ## Version 3.7.1
 
 - Changed:

setup.py

@@ -30,7 +30,7 @@ def about_package(init_posixpath: pathlib.Path) -> dict:
 # Dependencies for the package itself
 DEPENDENCIES = [
     "numpy>=1.19.0",
-    "pandas>=1.0,<2.1.0",
+    "pandas>=1.0",
 ]
 
 # Extra dependencies

tfs/__init__.py

@@ -10,7 +10,7 @@
 __title__ = "tfs-pandas"
 __description__ = "Read and write tfs files."
 __url__ = "https://github.com/pylhc/tfs"
-__version__ = "3.7.1"
+__version__ = "3.7.2"
 __author__ = "pylhc"
 __author_email__ = "[email protected]"
 __license__ = "MIT"

tfs/frame.py

@@ -58,7 +58,19 @@ def __getattr__(self, name: str) -> object:
 
     @property
     def _constructor(self):
+        """ Function called, whenever a new ``TfsDataFrame`` is created
+        by pandas functionality, to ensure the new object is also a ``TfsDataFrame``.
+        """
         return TfsDataFrame
+
+    def _constructor_from_mgr(self, mgr, axes):
+        """ Initialize new ``TfsDataFrame`` from a dataframe manager. 
+        This function is needed since pandas v2.1.0 to ensure the new object 
+        given to __init__() already contains the headers. 
+        See https://github.com/pandas-dev/pandas/issues/55120 """
+        obj = self._from_mgr(mgr, axes)
+        obj.headers = {}
+        return obj
 
     def _headers_repr(self) -> str:
         space: str = " " * 4