### Install pypinyin using uv

Source: https://github.com/mozillazg/python-pinyin/blob/master/README_en.rst

Use this command to install the pypinyin library via uv.

```bash
uv add pypinyin
```

--------------------------------

### Install pypinyin using pip

Source: https://github.com/mozillazg/python-pinyin/blob/master/README_en.rst

Use this command to install the pypinyin library via pip.

```bash
pip install pypinyin
```

--------------------------------

### Using Custom Phrases Dictionary with Jieba

Source: https://github.com/mozillazg/python-pinyin/blob/master/CHANGELOG.rst

Shows how to load a custom phrases dictionary for pinyin conversion using the jieba segmentation module. This example is from version 0.25.0.

```python
>>> from pypinyin import pinyin, load_phrases_dict
>>> load_phrases_dict({'了局': [['liǎo'], ['jú']]})
>>> pinyin('了局啊')   # 使用 jieba 分词
Building prefix dict from the default dictionary ...
Dumping model to file cache /var/folders/s6/z9r_07h53pj_d4x7qjszwmbw0000gn/T/jieba.cache
Loading model cost 1.175 seconds.
Prefix dict has been built succesfully.
[['le'], ['jú'], ['a']]
```

--------------------------------

### Convert Chinese to Pinyin using pypinyin CLI

Source: https://github.com/mozillazg/python-pinyin/blob/master/docs/usage.md

Use the `pypinyin` command-line tool to convert Chinese characters to Pinyin. This example shows a basic conversion.

```console
$ pypinyin 音乐
yin yuè
```

--------------------------------

### Standalone Usage of Max-Match Segmentation

Source: https://github.com/mozillazg/python-pinyin/blob/master/CHANGELOG.rst

Illustrates the standalone usage of the built-in forward max-match segmentation module for text segmentation. This example is from version 0.25.0.

```python
>>> from pypinyin.contrib.mmseg import seg
>>> text = '你好，我是中国人，我爱我的祖国'
>>> seg.cut(text)
<generator object Seg.cut at 0x10b2df2b0>
>>> list(seg.cut(text))
['你好', '，', '我', '是', '中国人', '，', '我', '爱',
 '我的', '祖', '国']
>>> seg.train(['祖国', '我是'])
>>> list(seg.cut(text))
['你好', '，', '我是', '中国人', '，', '我', '爱',
 '我的', '祖国']
>>>
```

--------------------------------

### Using Custom Phrases Dictionary with Built-in Max-Match Segmentation

Source: https://github.com/mozillazg/python-pinyin/blob/master/CHANGELOG.rst

Demonstrates using the built-in forward max-match segmentation module with a custom phrases dictionary for pinyin conversion. This example is from version 0.25.0.

```python
>>> from pypinyin.contrib.mmseg import seg, retrain
>>> retrain(seg)   # 没有使用 load_phrases_dict 时可以不调用这个函数
>>> pinyin(seg.cut('了局啊'))  # 使用内置的正向最大匹配分词
[['liǎo'], ['jú'], ['a']]
```

--------------------------------

### Convert Pinyin to different tone styles using toneconvert

Source: https://github.com/mozillazg/python-pinyin/blob/master/docs/usage.md

Use the `toneconvert` tool to change Pinyin from one tone style to another. This example converts a tone-marked Pinyin string to a numbered tone style.

```default
$ python -m pypinyin.tools.toneconvert to-tone 'zhong4 xin1'
zhòng xīn
```

--------------------------------

### Pinyin Accuracy with INITIALS Style

Source: https://github.com/mozillazg/python-pinyin/blob/master/docs/faq.md

In the `INITIALS` style, characters starting with 'y', 'w', 'yu' may return empty strings because these are not considered initial consonants according to the standard. Consider using `strict=False` if you want 'y' to be treated as an initial.

```python
pinyin('火影忍者', style=Style.INITIALS)
[['h'], [''], ['r'], ['zh']]
```

--------------------------------

### Basic Pinyin Conversion

Source: https://github.com/mozillazg/python-pinyin/blob/master/docs/usage.md

Demonstrates basic pinyin conversion using Style.TONE.

```python
from pypinyin import Style, lazy_pinyin

lazy_pinyin('乌', style=Style.TONE)
```

```python
lazy_pinyin('迂', style=Style.TONE)
```

--------------------------------

### Command-line Tool Input from Standard Input

Source: https://github.com/mozillazg/python-pinyin/blob/master/docs/CHANGELOG.rst

Shows how to use the pypinyin command-line tool to process Chinese characters piped from standard input or from a file.

```bash
$ echo "你好" | pypinyin
nǐ hǎo
$ pypinyin < hello.txt
nǐ hǎo
```

--------------------------------

### pypinyin CLI detailed usage and arguments

Source: https://github.com/mozillazg/python-pinyin/blob/master/docs/usage.md

This displays the full usage information for the `pypinyin` CLI, detailing positional and optional arguments like function, style, separator, error handling, and heteronym support.

```console
$ pypinyin -h
usage: pypinyin [-h] [-V] [-f {pinyin,slug}]
                [-s {NORMAL,zhao,TONE,zh4ao,TONE2,zha4o,TONE3,zhao4,INITIALS,zh,FIRST_LETTER,z,FINALS,ao,FINALS_TONE,4ao,FINALS_TONE2,a4o,FINALS_TONE3,ao4,BOPOMOFO,BOPOMOFO_FIRST,CYRILLIC,CYRILLIC_FIRST}]
                [-p SEPARATOR] [-e {default,ignore,replace}] [-m]
                hans

convert chinese to pinyin.

positional arguments:
  hans                  chinese string

optional arguments:
  -h, --help            show this help message and exit
  -V, --version         show program's version number and exit
  -f {pinyin,slug}, --func {pinyin,slug}
                        function name (default: "pinyin")
  -s {NORMAL,zhao,TONE,zh4ao,TONE2,zha4o,TONE3,zhao4,INITIALS,zh,FIRST_LETTER,z,FINALS,ao,FINALS_TONE,4ao,FINALS_TONE2,a4o,FINALS_TONE3,ao4,BOPOMOFO,BOPOMOFO_FIRST,CYRILLIC,CYRILLIC_FIRST}, --style {NORMAL,zhao,TONE,zh4ao,TONE2,zha4o,TONE3,zhao4,INITIALS,zh,FIRST_LETTER,z,FINALS,ao,FINALS_TONE,4ao,FINALS_TONE2,a4o,FINALS_TONE3,ao4,BOPOMOFO,BOPOMOFO_FIRST,CYRILLIC,CYRILLIC_FIRST}
                        pinyin style (default: "zh4ao")
  -p SEPARATOR, --separator SEPARATOR
                        slug separator (default: "-")
  -e {default,ignore,replace}, --errors {default,ignore,replace}
                        how to handle none-pinyin string (default: "default")
  -m, --heteronym       enable heteronym
```

--------------------------------

### Pinyin Conversion with BOPOMOFO Styles

Source: https://github.com/mozillazg/python-pinyin/blob/master/docs/CHANGELOG.rst

Demonstrates the use of BOPOMOFO and BOPOMOFO_FIRST styles for converting Chinese characters to Zhuyin (Bopomofo) symbols.

```python
>>> pypinyin.pinyin('中心', style=pypinyin.BOPOMOFO)
[['ㄓㄨㄥ'], ['ㄒㄧㄣ']]
>>> pypinyin.pinyin('中心', style=pypinyin.BOPOMOFO_FIRST)
[['ㄓ'], ['ㄒ']]
```

--------------------------------

### Display toneconvert tool help information

Source: https://github.com/mozillazg/python-pinyin/blob/master/docs/usage.md

View the help message for the `toneconvert` tool to see available commands for Pinyin style conversion.

```default
$ python -m pypinyin.tools.toneconvert -h

usage: toneconvert.py [-h] {to-normal,to-tone,to-tone2,to-tone3} ...

options:
  -h, --help            show this help message and exit

subcommands:
  {to-normal,to-tone,to-tone2,to-tone3}
    to-normal           call pypinyin.contrib.tone_convert.to_normal() with inputs
    to-tone             call pypinyin.contrib.tone_convert.to_tone() with inputs
    to-tone2            call pypinyin.contrib.tone_convert.to_tone2() with inputs
    to-tone3            call pypinyin.contrib.tone_convert.to_tone3() with inputs
```

--------------------------------

### Display pypinyin CLI help information

Source: https://github.com/mozillazg/python-pinyin/blob/master/docs/usage.md

View the help message for the `pypinyin` command-line tool to understand its available arguments and options.

```console
$ pypinyin -h
```

--------------------------------

### Optimize Pinyin with External Dictionaries

Source: https://github.com/mozillazg/python-pinyin/blob/master/docs/faq.md

Utilize external dictionary files to improve pinyin accuracy. Load data from projects like `pypinyin-dict` for optimized results.

```python
# Use pinyin data from cc_cedict.txt in the phrase-pinyin-data project to optimize results
from pypinyin_dict.phrase_pinyin_data import cc_cedict
cc_cedict.load()

# Use pinyin data from cc_cedict.txt in the pinyin-data project to optimize results
from pypinyin_dict.pinyin_data import kxhc1983
kxhc1983.load()
```

--------------------------------

### Register Custom Pinyin Style

Source: https://github.com/mozillazg/python-pinyin/blob/master/docs/CHANGELOG.rst

Demonstrates how to register a custom pinyin style by decorating a function with `@register`. This allows for custom conversion logic for pinyin.

```python
from pypinyin.style import register

@register('style1')
def func(pinyin, **kwargs):
    # pinyin = xxx   # convert to style1
    return pinyin

def func(pinyin, **kwargs):
    # pinyin = xxx   # convert to style2
    return pinyin
register('style2', func=func)
```

--------------------------------

### Convert Pinyin Between Tone Styles

Source: https://github.com/mozillazg/python-pinyin/blob/master/docs/CHANGELOG.rst

The `pypinyin.contrib.tone_convert` module facilitates conversion between `Style.TONE`, `Style.TONE2`, `Style.TONE3`, and `Style.NORMAL`.

```python
# Example usage (assuming functions from pypinyin.contrib.tone_convert are imported)
# from pypinyin.contrib.tone_convert import to_tone, to_tone2, to_tone3, tone_to_tone2, tone_to_tone3
# to_tone('ni3') -> 'ni3'
# to_tone2('ni3') -> 'ni3'
# to_tone3('ni3') -> 'ni3'
# tone_to_tone2('ni3') -> 'ni3'
# tone_to_tone3('ni3') -> 'ni3'
```

--------------------------------

### Pinyin Conversion with CYRILLIC Styles

Source: https://github.com/mozillazg/python-pinyin/blob/master/docs/CHANGELOG.rst

Shows how to convert Chinese characters to Pinyin using the CYRILLIC and CYRILLIC_FIRST styles, which map Pinyin to Cyrillic characters.

```python
>>> pypinyin.pinyin('中心', style=pypinyin.CYRILLIC)
[['чжун1'], ['синь1']]
>>> pypinyin.pinyin('中心', style=pypinyin.CYRILLIC_FIRST)
[['ч'], ['с']]
```

--------------------------------

### Pinyin Conversion with TONE3 Styles

Source: https://github.com/mozillazg/python-pinyin/blob/master/docs/CHANGELOG.rst

Illustrates the TONE3 and FINALS_TONE3 styles, which represent Pinyin with tone numbers after the syllable or final, respectively.

```python
>>> pypinyin.pinyin('中心', style=pypinyin.TONE3)
[['zhong1'], ['xin1']]
>>> pypinyin.pinyin('中心', style=pypinyin.FINALS_TONE3)
[['ong1'], ['in1']]
```

--------------------------------

### Command Line Pinyin Conversion

Source: https://github.com/mozillazg/python-pinyin/blob/master/README_en.rst

Converts Chinese characters to pinyin directly from the command line.

```console
pypinyin 音乐
```

--------------------------------

### Lazy Pinyin with Tone Sandhi

Source: https://github.com/mozillazg/python-pinyin/blob/master/docs/CHANGELOG.rst

Demonstrates the `tone_sandhi` parameter in `lazy_pinyin` which controls tone sandhi rules for pinyin results.

```python
from pypinyin import Style, lazy_pinyin

print(lazy_pinyin('你好', style=Style.TONE2))
print(lazy_pinyin('你好', style=Style.TONE2, tone_sandhi=True))
```

--------------------------------

### Convert Pinyin to Initials and Finals Styles

Source: https://github.com/mozillazg/python-pinyin/blob/master/docs/CHANGELOG.rst

New functions `to_initials` and `to_finals` are added to `pypinyin.contrib.tone_convert` for converting pinyin to `Style.INITIALS` and `Style.FINALS`.

```python
from pypinyin import Style
from pypinyin.contrib.tone_convert import to_initials, to_finals

# Example usage (assuming these functions are available and imported)
# to_initials('ni3') -> 'n'
# to_finals('ni3') -> 'i'
```

--------------------------------

### V to U Conversion in Pinyin

Source: https://github.com/mozillazg/python-pinyin/blob/master/docs/CHANGELOG.rst

Demonstrates the `v_to_u` parameter in `lazy_pinyin` for using 'ü' instead of 'v' in pinyin styles without tones.

```python
from pypinyin import lazy_pinyin

print(lazy_pinyin('战略'))
print(lazy_pinyin('战略', v_to_u=True))
```

--------------------------------

### Convert Pinyin to FINALS_TONE Styles

Source: https://github.com/mozillazg/python-pinyin/blob/master/CHANGELOG.rst

Use to_finals_tone, to_finals_tone2, and to_finals_tone3 functions from pypinyin.contrib.tone_convert to convert pinyin to specific final tone styles.

```python
from pypinyin.contrib import tone_convert

# Example usage (assuming pinyin input)
# result_tone = tone_convert.to_finals_tone('ni3')
# result_tone2 = tone_convert.to_finals_tone2('ni3')
# result_tone3 = tone_convert.to_finals_tone3('ni3')
```

--------------------------------

### Pinyin Conversion with TONE3 Style and Heteronyms

Source: https://github.com/mozillazg/python-pinyin/blob/master/README_en.rst

Converts Chinese characters to pinyin using the TONE3 style (numbers at the end of syllables) and includes heteronyms.

```python
pinyin('中心', style=Style.TONE3, heteronym=True)
```

--------------------------------

### Convert Pinyin to Finals with Tones

Source: https://github.com/mozillazg/python-pinyin/blob/master/docs/CHANGELOG.rst

Introduces new functions in `pypinyin.contrib.tone_convert` for converting pinyin to specific finals tone styles.

```python
from pypinyin import Style
from pypinyin.contrib.tone_convert import to_finals_tone, to_finals_tone2, to_finals_tone3

# Example usage (assuming these functions are available and imported)
# to_finals_tone('ni3') -> 'ni'
# to_finals_tone2('ni3') -> 'nii'
# to_finals_tone3('ni3') -> 'ni3'
```

--------------------------------

### Pinyin Conversion with TONE2 Style and Heteronyms

Source: https://github.com/mozillazg/python-pinyin/blob/master/README_en.rst

Converts Chinese characters to pinyin using the TONE2 style (numbers at the end of syllables) and includes heteronyms.

```python
pinyin('中心', style=Style.TONE2, heteronym=True)
```

--------------------------------

### Extracting Syllable Initials (Standard Rules)

Source: https://github.com/mozillazg/python-pinyin/blob/master/README_en.rst

Extracts only the initial consonant of each pinyin syllable according to standard rules. Characters without an initial will result in an empty string.

```python
from pypinyin import Style, pinyin
pinyin('下雨天', style=Style.INITIALS)
```

--------------------------------

### Pinyin Conversion with Heteronyms

Source: https://github.com/mozillazg/python-pinyin/blob/master/README_en.rst

Converts Chinese characters to pinyin, enabling heteronym mode to capture multiple possible pronunciations.

```python
pinyin('中心', heteronym=True)
```

--------------------------------

### Zhuyin (Bopomofo) Conversion

Source: https://github.com/mozillazg/python-pinyin/blob/master/README_en.rst

Converts Chinese characters to Zhuyin (Bopomofo) symbols.

```python
pinyin('中心', style=Style.BOPOMOFO)
```

--------------------------------

### Pinyin Styles with Finals

Source: https://github.com/mozillazg/python-pinyin/blob/master/CHANGELOG.rst

Demonstrates the three new pinyin styles introduced in version 0.3.0 for handling finals: STYLE_FINALS (no tone), STYLE_FINALS_TONE (tone on first letter), and STYLE_FINALS_TONE2 (tone as number suffix).

```python
pypinyin.STYLE_FINALS
```

```python
pypinyin.STYLE_FINALS_TONE
```

```python
pypinyin.STYLE_FINALS_TONE2
```

--------------------------------

### Convert Pinyin Styles

Source: https://github.com/mozillazg/python-pinyin/blob/master/docs/faq.md

Use the `tone_convert` module to transform pinyin between different styles, such as converting to normal (no tone marks) or extracting initials and finals.

```python
from pypinyin.contrib.tone_convert import to_normal, to_tone, to_initials, to_finals
to_normal('zhōng')
'zhong'
to_tone('zhong1')
'zhōng'
to_initials('zhōng')
'zh'
to_finals('zhōng')
'ong'
```

--------------------------------

### Neutral Tone with Five Indicator

Source: https://github.com/mozillazg/python-pinyin/blob/master/docs/CHANGELOG.rst

Shows the `neutral_tone_with_five` parameter in `lazy_pinyin` for indicating neutral tones with '5' in numbered tone styles.

```python
from pypinyin import Style, lazy_pinyin

print(lazy_pinyin('衣裳', style=Style.TONE3))
print(lazy_pinyin('衣裳', style=Style.TONE3, neutral_tone_with_five=True))
```

--------------------------------

### Customizing Pinyin Phrases for Heteronyms

Source: https://github.com/mozillazg/python-pinyin/blob/master/README_en.rst

Loads custom phrases to correct or define pinyin for specific character sequences, especially for heteronyms.

```python
from pypinyin import Style, pinyin, load_phrases_dict
pinyin('步履蹒跚')
load_phrases_dict({'步履蹒跚': [['bù'], ['lǚ'], ['pán'], ['shān']]})
pinyin('步履蹒跚')
```

--------------------------------

### Pinyin Styles: Finals with Tone (Style 1)

Source: https://github.com/mozillazg/python-pinyin/blob/master/docs/CHANGELOG.rst

Demonstrates the STYLE_FINALS_TONE pinyin style, which returns the final part of the pinyin with tone marks indicated on the first letter of the final. This is one of three new pinyin styles.

```python
pypinyin.STYLE_FINALS_TONE
```

--------------------------------

### Handling Errors with a Callback Function

Source: https://github.com/mozillazg/python-pinyin/blob/master/CHANGELOG.rst

Demonstrates how to handle errors by providing a callback function that extends the result list. This change was introduced in version 0.34.0.

```python
>>> pinyin('你好☆☆', errors=lambda x: ['star' for _ in x])
[['nǐ'], ['hǎo'], ['star', 'star']]

>>> pinyin('你好☆☆', errors=lambda x: ['star' for _ in x])
[['nǐ'], ['hǎo'], ['star'], ['star']]
```

--------------------------------

### Extracting Initials with Strict Mode

Source: https://github.com/mozillazg/python-pinyin/blob/master/docs/usage.md

Shows how the 'strict' parameter affects the extraction of initials. When strict=False, 'w' is treated as an initial for '乌'.

```python
lazy_pinyin('乌', style=Style.INITIALS)
```

```python
lazy_pinyin('乌', style=Style.INITIALS, strict=False)
```

--------------------------------

### Pinyin Styles: Finals with Tone (Style 2)

Source: https://github.com/mozillazg/python-pinyin/blob/master/docs/CHANGELOG.rst

Demonstrates the STYLE_FINALS_TONE2 pinyin style, which returns the final part of the pinyin with tone marks indicated by numbers [0-4] after the final. This is one of three new pinyin styles.

```python
pypinyin.STYLE_FINALS_TONE2
```

--------------------------------

### Basic Pinyin Conversion

Source: https://github.com/mozillazg/python-pinyin/blob/master/README_en.rst

Converts Chinese characters to pinyin. For Python 2, use u'中心' instead of '中心'.

```python
from pypinyin import pinyin, lazy_pinyin, Style
pinyin('中心')
```

--------------------------------

### Customize Pinyin with Custom Dictionaries

Source: https://github.com/mozillazg/python-pinyin/blob/master/docs/faq.md

Add custom phrases or single character pinyin mappings to correct or override default results. Use `load_phrases_dict` for multi-character words and `load_single_dict` for individual characters.

```python
from pypinyin import load_phrases_dict, load_single_dict

load_phrases_dict({'桔子': [['jú'], ['zǐ']]})  # Add "桔子" phrase

load_single_dict({ord('还'): 'hái,huán'})  # Adjust pinyin order or override default for "还"
```

--------------------------------

### Handle Pinyin for Segmented Words

Source: https://github.com/mozillazg/python-pinyin/blob/master/docs/faq.md

When dealing with text that has already been segmented into words (e.g., by a library like jieba), pass the list of words directly to the pinyin function.

```python
# Use other word segmentation modules, like jieba, or segment words using other algorithms based on the phrases_dict.py word data
words = list(jieba.cut('每股24.67美元的确定性协议'))
pinyin(words)
```

--------------------------------

### Wade-Giles Pinyin Style

Source: https://github.com/mozillazg/python-pinyin/blob/master/docs/CHANGELOG.rst

Introduces the `Style.WADEGILES` for Wade-Giles romanization without tones.

```python
from pypinyin import Style, lazy_pinyin

print(lazy_pinyin('威妥玛拼音', style=Style.WADEGILES))
```

--------------------------------

### Use '5' for Neutral Tone in Numbered Styles

Source: https://github.com/mozillazg/python-pinyin/blob/master/CHANGELOG.rst

When neutral_tone_with_five is set to True, numbered tone styles will use '5' to indicate a neutral tone. This applies to the pinyin and lazy_pinyin functions.

```python
from pypinyin import lazy_pinyin, Style

print(lazy_pinyin('衣裳', style=Style.TONE3))
# Expected: ['yi1', 'shang']

print(lazy_pinyin('衣裳', style=Style.TONE3, neutral_tone_with_five=True))
# Expected: ['yi1', 'shang5']
```

--------------------------------

### Extracting Syllable Initials (Non-Strict Mode)

Source: https://github.com/mozillazg/python-pinyin/blob/master/README_en.rst

Extracts syllable initials, treating 'y' as an initial even when it follows a vowel, deviating from strict pinyin rules.

```python
pinyin('下雨天', style=Style.INITIALS, strict=False)
```

--------------------------------

### Pinyin Conversion with First Letter Style

Source: https://github.com/mozillazg/python-pinyin/blob/master/README_en.rst

Converts Chinese characters to their first pinyin letter, useful for abbreviations or specific formatting.

```python
pinyin('中心', style=Style.FIRST_LETTER)
```

--------------------------------

### Pinyin Conversion with Mixed Chinese and English

Source: https://github.com/mozillazg/python-pinyin/blob/master/docs/CHANGELOG.rst

Converts a string containing both Chinese characters and English letters to their pinyin representation. This improved support handles mixed content effectively.

```python
>> pypinyin.pinyin(u'你好abc')
[[u'n\u01d0'], [u'h\u01ceo'], [u'abc']]
```

--------------------------------

### Extracting Finals with Strict Mode

Source: https://github.com/mozillazg/python-pinyin/blob/master/docs/usage.md

Illustrates the effect of the 'strict' parameter on extracting finals with tone. When strict=False, 'ü' in '迂' is simplified to 'u'.

```python
lazy_pinyin('迂', style=Style.FINALS_TONE)
```

```python
lazy_pinyin('迂', style=Style.FINALS_TONE, strict=False)
```

--------------------------------

### Pinyin Styles: Finals

Source: https://github.com/mozillazg/python-pinyin/blob/master/docs/CHANGELOG.rst

Demonstrates the STYLE_FINALS pinyin style, which returns only the final part of the pinyin without tone marks. This is one of three new pinyin styles introduced.

```python
pypinyin.STYLE_FINALS
```

--------------------------------

### Lazy Pinyin Conversion

Source: https://github.com/mozillazg/python-pinyin/blob/master/README_en.rst

Converts Chinese characters to pinyin without tone information or heteronyms. Uses 'v' for 'ü'.

```python
lazy_pinyin('中心')
```

--------------------------------

### Use 'ü' instead of 'v' in Pinyin Styles

Source: https://github.com/mozillazg/python-pinyin/blob/master/CHANGELOG.rst

When v_to_u is set to True, pinyin styles without tones will use 'ü' instead of 'v'. This applies to the pinyin and lazy_pinyin functions.

```python
from pypinyin import lazy_pinyin

print(lazy_pinyin('战略'))
# Expected: ['zhan', 'lve']

print(lazy_pinyin('战略', v_to_u=True))
# Expected: ['zhan', 'lüe']
```

--------------------------------

### Pinyin Without Initials or Finals

Source: https://github.com/mozillazg/python-pinyin/blob/master/docs/faq.md

In `strict=True` mode, some pinyin may lack both an initial and a final. This is particularly true for characters like '嗯', '呒', '呣', '唔'.

```default
ń ńg ňg ǹg ň ǹ m̄ ḿ m̀
```

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