Merge pull request #240 from kayjan/polars-fix

fix: polars error handling and python 3.7 support

Author: kayjan

CHANGELOG.md

@@ -5,6 +5,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Changed:
+- Misc: Remove support of Python 3.7 due to incompatibility with polars.
+### Fixed:
+- Tree Constructor and Exporter: Error handling when user only partially download optional dependencies of pandas/polars.
 
 ## [0.18.0] - 2024-05-28
 ### Added:

bigtree/utils/assertions.py

@@ -142,7 +142,7 @@ def assert_dataframe_no_duplicate_attribute(
         id_col (str): column of data that is unique, can be name or path
         attribute_cols (List[str]): columns of data containing node attribute information,
     """
-    if isinstance(data, pd.DataFrame):
+    if pd and isinstance(data, pd.DataFrame):
         data_check = data[[id_col] + attribute_cols].astype(str).drop_duplicates()
         duplicate_check = (
             data_check[id_col]
@@ -175,7 +175,7 @@ def assert_dataframe_no_duplicate_children(
         parent_col (str): column of data containing parent name information
     """
     # Filter for child nodes that are parent of other nodes
-    if isinstance(data, pd.DataFrame):
+    if pd and isinstance(data, pd.DataFrame):
         data_check = data[[child_col, parent_col]].drop_duplicates()
         data_check = data_check[data_check[child_col].isin(data_check[parent_col])]
         duplicate_check = (

pyproject.toml

@@ -6,7 +6,7 @@ build-backend = "hatchling.build"
 name = "bigtree"
 description = "Tree Implementation and Methods for Python, integrated with list, dictionary, pandas and polars DataFrame."
 readme = "README.md"
-requires-python = ">=3.7"
+requires-python = ">=3.8"
 license = {text = "MIT"}
 keywords = [
   "tree",
@@ -18,7 +18,6 @@ authors = [
 classifiers = [
   "Development Status :: 4 - Beta",
   "Programming Language :: Python",
-  "Programming Language :: Python :: 3.7",
   "Programming Language :: Python :: 3.8",
   "Programming Language :: Python :: 3.9",
   "Programming Language :: Python :: 3.10",