diff options
| -rw-r--r-- | pkg_resources/__init__.py | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/pkg_resources/__init__.py b/pkg_resources/__init__.py index ae363755..df662dfe 100644 --- a/pkg_resources/__init__.py +++ b/pkg_resources/__init__.py @@ -1536,7 +1536,7 @@ class MarkerEvaluation(object): # markerlib implements Metadata 1.2 (PEP 345) environment markers. # Translate the variables to Metadata 2.0 (PEP 426). env = _markerlib.default_environment() - for key in env.keys(): + for key in tuple(env.keys()): new_key = key.replace('.', '_') env[new_key] = env.pop(key) try: |