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-rw-r--r--libbe/storage/util/upgrade.py10
1 files changed, 9 insertions, 1 deletions
diff --git a/libbe/storage/util/upgrade.py b/libbe/storage/util/upgrade.py
index fdbc578..98091f2 100644
--- a/libbe/storage/util/upgrade.py
+++ b/libbe/storage/util/upgrade.py
@@ -27,7 +27,11 @@ import os, os.path
import sys
import types
-import yaml
+try:
+ import yaml
+except ImportError as e:
+ yaml = None
+ _yaml_import_error = e
import libbe
import libbe.bug
@@ -50,6 +54,8 @@ def generate_yaml_mapfile(map):
>>> generate_yaml_mapfile({'q':u'hello'})
'q: hello\\n\\n'
"""
+ if yaml is None:
+ raise _yaml_import_error
keys = map.keys()
keys.sort()
for key in keys:
@@ -93,6 +99,8 @@ def parse_yaml_mapfile(contents):
>>> dict['q']
u'Fran\\xe7ais'
"""
+ if yaml is None:
+ raise _yaml_import_error
c = yaml.safe_load(contents)
if type(c) == types.StringType:
raise mapfile.InvalidMapfileContents(