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-rw-r--r--Lib/_strptime.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/Lib/_strptime.py b/Lib/_strptime.py
index ba9dde0..635613e 100644
--- a/Lib/_strptime.py
+++ b/Lib/_strptime.py
@@ -430,7 +430,8 @@ def strptime(data_string, format="%a %b %d %H:%M:%S %Y"):
_regex_cache[format] = format_regex
found = format_regex.match(data_string)
if not found:
- raise ValueError("time data did not match format")
+ raise ValueError("time data did not match format: data=%s fmt=%s" %
+ (data_string, format))
if len(data_string) != found.end():
raise ValueError("unconverted data remains: %s" %
data_string[found.end():])