Running into TypeError: 'int' object is not subscriptable when calling update on ruamel.yaml.comments import CommentedMap - ruamel.yaml

Question

When I am trying to update my code to the new version of ruamel.yaml, I am running into issues.
code:
import sys
import ruamel.yaml
print('Python', tuple(sys.version_info), ', ruamel.yaml', ruamel.yaml.version_info)
yaml_str = """\
number_to_name:
1: name1
2: name2
"""
yaml = ruamel.yaml.YAML()
data = yaml.load(yaml_str)
print('before:', data)
data.update({4: 'name4'})
print('after: ', data)
print('==========')
yaml.dump(data, sys.stdout)
output with ruamel.yaml (0, 17, 4):
Python (3, 6, 13, 'final', 0) , ruamel.yaml (0, 17, 4)
before: ordereddict([('number_to_name', ordereddict([(1, 'name1'), (2, 'name2')]))])
Traceback (most recent call last):
File "/home/lib/python3.6/site-packages/ruamel/yaml/comments.py", line 779, in update
self._ok.update(vals.keys()) # type: ignore
AttributeError: 'tuple' object has no attribute 'keys'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "bin/runamel.py", line 15, in <module>
data.update({4: 'name4'})
File "/home/lib/python3.6/site-packages/ruamel/yaml/comments.py", line 783, in update
self._ok.add(x[0])
TypeError: 'int' object is not subscriptable
The same code with the old version is working fine.
output with ruamel.yaml (0, 16, 10)
Python (3, 6, 13, 'final', 0) , ruamel.yaml (0, 16, 10)
before: ordereddict([('number_to_name', ordereddict([(1, 'name1'), (2, 'name2')]))])
after: ordereddict([('number_to_name', ordereddict([(1, 'name1'), (2, 'name2')])), (4, 'name4')])
==========
number_to_name:
1: name1
2: name2
4: name4
What I am doing wrong? (I Also suspect vals.keys() at line 779 is always going to raise Attribute error as vals is a tuple)

Answer 1

This is an issue introduced between ruamel.yaml versions 0.6.12 and 0.6.13. It has been fixed
in version 0.17.9
import sys
import ruamel.yaml
print('Python', tuple(sys.version_info), ', ruamel.yaml', ruamel.yaml.version_info)
yaml_str = """\
number_to_name:
1: name1
2: name2
"""
yaml = ruamel.yaml.YAML()
data = yaml.load(yaml_str)
print('before:', data)
data.update({4: 'name4'})
print('after: ', data)
print('==========')
yaml.dump(data, sys.stdout)
which gives:
Python (3, 9, 4, 'final', 0) , ruamel.yaml (0, 17, 9)
before: ordereddict([('number_to_name', ordereddict([(1, 'name1'), (2, 'name2')]))])
after: ordereddict([('number_to_name', ordereddict([(1, 'name1'), (2, 'name2')])), (4, 'name4')])
==========
number_to_name:
1: name1
2: name2
4: name4