TypeError: 'NoneType' object is not iterable

[jeyrce]

It's my configure following:

[bumpversion]
current_version = 0.1.1-dev
commit = False
tag = True
tag_name = 'v{new_version}'
message = 'Bump version: {current_version} → {new_version}'
parse = (?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)-(?P<release>[a-z]+)
serialize = 
    {major}.{minor}.{patch}-{release}
    {major}.{minor}.{patch}

[bumpversion:part:release]
optional_value = rel
values = 
    dev
    rel

[bumpversion:file:VERSION]
search = {current_version}
replace = {new_version}

[bumpversion:file:README.md]
search = VERSION: {current_version}
replace = {new_version}

[bumpversion:file:src/__init__.py]
search = __version__ == {current_version}
replace = {new_version}

[bumpversion:file:src/app-one/__init__.py]
search = __version__ == {current_version}
replace = {new_version}

[bumpversion:file:src/app-two/__init__.py]
search = __version__ == {current_version}
replace = {new_version}

When I update the version 0.1.1-dev to 0.1.1-rel, I tried the command:

bumpversion release

Error occured like this:

(python3) jeeyshe@jeeyshe-PC:~/Code/python/xshop$ bumpversion release
Evaluating 'parse' option: '(?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)-(?P<release>[a-z]+)' does not parse current version '0.1.1'
Traceback (most recent call last):
  File "/home/jeeyshe/.local/share/.virtualenvs/python3/bin/bumpversion", line 8, in <module>
    sys.exit(main())
  File "/home/jeeyshe/.local/share/.virtualenvs/python3/lib/python3.8/site-packages/bumpversion/__init__.py", line 916, in main
    f.replace(current_version, new_version, context, args.dry_run)
  File "/home/jeeyshe/.local/share/.virtualenvs/python3/lib/python3.8/site-packages/bumpversion/__init__.py", line 238, in replace
    context['new_version'] = self._versionconfig.serialize(new_version, context)
  File "/home/jeeyshe/.local/share/.virtualenvs/python3/lib/python3.8/site-packages/bumpversion/__init__.py", line 561, in serialize
    serialized = self._serialize(version, self._choose_serialize_format(version, context), context)
  File "/home/jeeyshe/.local/share/.virtualenvs/python3/lib/python3.8/site-packages/bumpversion/__init__.py", line 542, in _choose_serialize_format
    self._serialize(version, serialize_format, context, raise_if_incomplete=True)
  File "/home/jeeyshe/.local/share/.virtualenvs/python3/lib/python3.8/site-packages/bumpversion/__init__.py", line 485, in _serialize
    for k in version:
TypeError: 'NoneType' object is not iterable

Is there some thing wrong?

[jeyrce]

It's my fault, I make it

[bumpversion]
current_version = 0.1.8-rel
commit = False
tag = True
tag_name = 'v{new_version}'
message = 'Bump version: {current_version} → {new_version}'
parse = (?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)-{0,1}(?P<release>[a-z]*)
serialize = 
    {major}.{minor}.{patch}-{release}
    {major}.{minor}.{patch}

[bumpversion:part:release]
optional_value = dev
values = 
    dev
    rel

[bumpversion:file:VERSION]
search = {current_version}
replace = {new_version}

[bumpversion:file:README.md]
search = VERSION: {current_version}
replace = {new_version}

[bumpversion:file:src/__init__.py]
search = __version__ == {current_version}
replace = {new_version}

[bumpversion:file:src/app-one/__init__.py]
search = __version__ == {current_version}
replace = {new_version}

[bumpversion:file:src/app-two/__init__.py]
search = __version__ == {current_version}
replace = {new_version}