Direct import statements instead of importlib

The call to importlib was to satisfy a linter used previously. Using
direct imports is simpler and more meaningful for mypy.

Author: amorison

stagpy/__init__.py

@@ -17,23 +17,18 @@
 """
 
 from __future__ import annotations
-import importlib
 import os
 import pathlib
 import shutil
 import signal
 import sys
-import typing
 
 from pkg_resources import get_distribution, DistributionNotFound
 from setuptools_scm import get_version
 from loam.manager import ConfigurationManager
 
 from . import config
 
-if typing.TYPE_CHECKING:
-    from typing import Any
-
 
 def _env(var: str) -> bool:
     """Return whether var is set to True."""
@@ -74,7 +69,7 @@ def _check_config():
 
 def load_mplstyle():
     """Try to load conf.plot.mplstyle matplotlib style."""
-    plt: Any = importlib.import_module('matplotlib.pyplot')
+    import matplotlib.pyplot as plt
     if conf.plot.mplstyle:
         for style in conf.plot.mplstyle.split():
             found = False

stagpy/__main__.py

@@ -1,6 +1,5 @@
 """The stagpy module is callable."""
 
-import importlib
 import signal
 import sys
 import warnings
@@ -13,8 +12,7 @@ def main():
     if not DEBUG:
         signal.signal(signal.SIGINT, sigint_handler)
         warnings.simplefilter('ignore')
-    args = importlib.import_module('stagpy.args')
-    error = importlib.import_module('stagpy.error')
+    from . import args, error
     try:
         args.parse_args()()
     except error.StagpyError as err: