google / sedpack / 11658389015

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modernize typehints (#52)

Closes #49 

Used python script to automate changes:

```python
import re
from pathlib import Path

project_dir = Path("path")

optional_pattern = re.compile(r"Optional\[(.+)\]")

def replace_optional(match):
    '''Replace "Optional[...]" with "... | None"'''
    content = match.group(1)
    bracket_count = 0
    end_index = -1

    for i, char in enumerate(content):
        if char == '[':
            bracket_count += 1
        elif char == ']':
            bracket_count -= 1
            if bracket_count == 0:
                end_index = i
                break

    if end_index != -1:
        return f"{content[:end_index + 1]} | None{content[end_index + 1:]}"
    else:
        return f"{content} | None"  

patterns = [
    (re.compile(r"\bList\b"), "list"),
    (re.compile(r"\bDict\b"), "dict"),
    (re.compile(r"\bTuple\b"), "tuple"),
]


for filepath in project_dir.rglob("*.py"):
    with open(filepath, "r", encoding="utf-8") as file:
        content = file.read()
    
    content = optional_pattern.sub(replace_optional, content)

    for pattern, replacement in patterns:
        content = pattern.sub(replacement, content)

    with open(filepath, "w", encoding="utf-8") as file:
        file.write(content)
```

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Co-authored-by: kralka <kralkareliv@gmail.com>

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2284 of 2643 relevant lines covered (86.42%)

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