modify the way of importing importlib_metadata

pegasusio/__init__.py

@@ -29,7 +29,10 @@
 from .readwrite import infer_file_type, read_input, write_output, write_scp_file
 from .data_aggregation import aggregate_matrices
 
-from importlib_metadata import version, PackageNotFoundError
+try:
+    from importlib.metadata import version, PackageNotFoundError
+except ImportError:  # < Python 3.8: Use backport module
+    from importlib_metadata import version, PackageNotFoundError
 
 try:
     __version__ = version(__name__)

requirements.txt

@@ -7,5 +7,5 @@ numpy
 pandas
 scipy
 setuptools
-importlib-metadata
+importlib_metadata>=0.7; python_version < '3.8'
 zarr

setup.py

@@ -25,19 +25,19 @@
     author="Yiming Yang, Joshua Gould and Bo Li",
     author_email="cumulus-support@googlegroups.com",
     classifiers=[  # https://pypi.python.org/pypi?%3Aaction=list_classifiers
-        "Development Status :: 3 - Alpha",
+        "Development Status :: 4 - Beta",
+        "Framework :: Jupyter",
         "Intended Audience :: Developers",
         "Intended Audience :: Science/Research",
-        "Topic :: Software Development :: Build Tools",
         "License :: OSI Approved :: BSD License",
+        "Natural Language :: English",
+        "Operating System :: MacOS :: MacOS X",
+        "Operating System :: POSIX :: Linux",
         "Programming Language :: Python :: 3",
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
-        "Framework :: Jupyter",
-        "Natural Language :: English",
-        "Operating System :: MacOS :: MacOS X",
-        "Operating System :: POSIX :: Linux",
+        "Topic :: Software Development :: Build Tools",
         "Topic :: Scientific/Engineering :: Bio-Informatics",
     ],
     keywords="single cell/nucleus genomics data reading and writing",