TL;DR love of Satan
On Fri, Apr 26, 2019 at 2:48 PM Derek Dagit <da...@apache.org> wrote:
> I think it should be consistent.
>
> The first line establishes an indentation width of 2 spaces.
>
> The second line is a list element that itself is a map of one entry, and
> your multi-line text is the value for this entry.
>
> Since it is nested, in effect we need to indent twice, and so I think that
> is why 4 spaces works when 2 does not in this case.
>
> On Fri, Apr 26, 2019 at 2:32 PM Walt Karas <wka...@verizonmedia.com
> .invalid>
> wrote:
>
> > So, it seems that with YAML, it sometimes matters whether you use 4
> spaces
> > of indentation rather that 2 space of indentation. Is there some reason
> we
> > are choosing to use YAML, other than sheer love of Satan?
> >
> > $ cat load.py
> >
> > import yaml
> >
> > import sys
> >
> > f = open(sys.argv[1], 'r')
> >
> > y = yaml.load(f)
> >
> > print(y)
> >
> > $
> >
> > $ cat y1.yaml
> >
> > a:
> >
> > - b: |
> >
> > one
> >
> > two
> >
> > - c: |
> >
> > three
> >
> > four
> >
> > $
> >
> > $ cat y2.yaml
> >
> > a:
> >
> > - b: |
> >
> > one
> >
> > two
> >
> > - c: |
> >
> > three
> >
> > four
> >
> > $
> >
> > $ python load.py y1.yaml
> >
> > {'a': [{'b': 'one\ntwo\n'}, {'c': 'three\nfour\n'}]}
> >
> > $
> >
> > $ python load.py y2.yaml
> >
> > Traceback (most recent call last):
> >
> > File "load.py", line 4, in <module>
> >
> > y = yaml.load(f)
> >
> > File "/usr/local/lib/python2.7/site-packages/yaml/__init__.py", line
> 71,
> > in load
> >
> > return loader.get_single_data()
> >
> > File "/usr/local/lib/python2.7/site-packages/yaml/constructor.py", line
> > 37, in get_single_data
> >
> > node = self.get_single_node()
> >
> > File "/usr/local/lib/python2.7/site-packages/yaml/composer.py", line
> 36,
> > in get_single_node
> >
> > document = self.compose_document()
> >
> > File "/usr/local/lib/python2.7/site-packages/yaml/composer.py", line
> 55,
> > in compose_document
> >
> > node = self.compose_node(None, None)
> >
> > File "/usr/local/lib/python2.7/site-packages/yaml/composer.py", line
> 84,
> > in compose_node
> >
> > node = self.compose_mapping_node(anchor)
> >
> > File "/usr/local/lib/python2.7/site-packages/yaml/composer.py", line
> 133,
> > in compose_mapping_node
> >
> > item_value = self.compose_node(node, item_key)
> >
> > File "/usr/local/lib/python2.7/site-packages/yaml/composer.py", line
> 82,
> > in compose_node
> >
> > node = self.compose_sequence_node(anchor)
> >
> > File "/usr/local/lib/python2.7/site-packages/yaml/composer.py", line
> 111,
> > in compose_sequence_node
> >
> > node.value.append(self.compose_node(node, index))
> >
> > File "/usr/local/lib/python2.7/site-packages/yaml/composer.py", line
> 84,
> > in compose_node
> >
> > node = self.compose_mapping_node(anchor)
> >
> > File "/usr/local/lib/python2.7/site-packages/yaml/composer.py", line
> 127,
> > in compose_mapping_node
> >
> > while not self.check_event(MappingEndEvent):
> >
> > File "/usr/local/lib/python2.7/site-packages/yaml/parser.py", line 98,
> in
> > check_event
> >
> > self.current_event = self.state()
> >
> > File "/usr/local/lib/python2.7/site-packages/yaml/parser.py", line 428,
> > in parse_block_mapping_key
> >
> > if self.check_token(KeyToken):
> >
> > File "/usr/local/lib/python2.7/site-packages/yaml/scanner.py", line
> 115,
> > in check_token
> >
> > while self.need_more_tokens():
> >
> > File "/usr/local/lib/python2.7/site-packages/yaml/scanner.py", line
> 149,
> > in need_more_tokens
> >
> > self.stale_possible_simple_keys()
> >
> > File "/usr/local/lib/python2.7/site-packages/yaml/scanner.py", line
> 289,
> > in stale_possible_simple_keys
> >
> > "could not find expected ':'", self.get_mark())
> >
> > yaml.scanner.ScannerError: while scanning a simple key
> >
> > in "y2.yaml", line 3, column 5
> >
> > could not find expected ':'
> >
> > in "y2.yaml", line 4, column 5
> >
>
