Stop using pkg_resources

tablib imports pkg_resources in order to find its own version. Importing
pkg_resources is very slow (100ms-250ms is common).

Avoid it by letting setuptools-scm generate a file with the version
instead.

1 files changed, 8 insertions, 7 deletions

diff --git a/src/tablib/__init__.py b/src/tablib/__init__.py
index 6e10d78..aecf3a4 100644
--- a/src/tablib/__init__.py
+++ b/src/tablib/__init__.py
@@ -1,5 +1,12 @@
 """ Tablib. """
-from pkg_resources import DistributionNotFound, get_distribution
+try:
+    # Generated by setuptools-scm.
+    from ._version import version as __version__
+except ImportError:
+    # Some broken installation.
+    __version__ = None
+
+
 from tablib.core import (  # noqa: F401
     Databook,
     Dataset,
@@ -10,9 +17,3 @@ from tablib.core import (  # noqa: F401
     import_book,
     import_set,
 )
-
-try:
-    __version__ = get_distribution(__name__).version
-except DistributionNotFound:
-    # package is not installed
-    __version__ = None