erjemin/instaloader
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_ArbitraryItemFormatter: Allow chaining attributes

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Override get_value() rather than get_field(), to allow chaining of item
attributes, such as --post-metadata-txt={owner_profile.profile_pic_url}.

Motivated by #151.
This commit is contained in:
Alexander Graf 2018-08-04 11:39:43 +02:00
parent b5aa268344
commit 7f81985911
1 changed files with 4 additions and 4 deletions
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8
instaloader/instaloader.py
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@ -49,11 +49,11 @@ class _ArbitraryItemFormatter(string.Formatter):
def __init__(self, item: Any):
self._item = item
def get_field(self, field_name, args, kwargs):
def get_value(self, key, args, kwargs):
"""Override to substitute {ATTRIBUTE} by attributes of our _item."""
if hasattr(self._item, field_name):
return self._item.__getattribute__(field_name), None
return super().get_field(field_name, args, kwargs)
if hasattr(self._item, key):
return getattr(self._item, key)
return super().get_value(key, args, kwargs)
def format_field(self, value, format_spec):
"""Override :meth:`string.Formatter.format_field` to have our