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Include the case of new key not being in the old mapping. #674

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Include the case of new key not being in the old mapping. #674

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6 changes: 3 additions & 3 deletions seqio/preprocessors.py
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Original file line number Diff line number Diff line change
Expand Up @@ -36,8 +36,8 @@ def rekey(x, key_map=None):
examples with the format
{'boo': 'something', 'spar': 'something else'}

If a mapping is to an empty key name or None, the new value is set to an empty
string.
If a mapping is to an empty key name or None or it does not exist in the given
mapping x, the new value is set to an empty string.

Args:
x: an example to process.
Expand All @@ -48,7 +48,7 @@ def rekey(x, key_map=None):
"""
if key_map:
return {
new_key: x[old_key] if old_key else ''
new_key: x[old_key] if (old_key and old_key in x) else ''
for new_key, old_key in key_map.items()
}
return x
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