






"""simple docstring"""


from collections import namedtuple

_UpperCamelCase   :						Optional[int]        = namedtuple("""from_to""", """from_ to""")

_UpperCamelCase   :						Tuple        = {
    """millimeter""": """mm""",
    """centimeter""": """cm""",
    """meter""": """m""",
    """kilometer""": """km""",
    """inch""": """in""",
    """inche""": """in""",  # Trailing 's' has been stripped off
    """feet""": """ft""",
    """foot""": """ft""",
    """yard""": """yd""",
    """mile""": """mi""",
}

_UpperCamelCase   :						Any        = {
    """mm""": from_to(0.0_0_1, 10_00),
    """cm""": from_to(0.0_1, 1_00),
    """m""": from_to(1, 1),
    """km""": from_to(10_00, 0.0_0_1),
    """in""": from_to(0.0_2_5_4, 3_9.3_7_0_1),
    """ft""": from_to(0.3_0_4_8, 3.2_8_0_8_4),
    """yd""": from_to(0.9_1_4_4, 1.0_9_3_6_1),
    """mi""": from_to(1_6_0_9.3_4, 0.0_0_0_6_2_1_3_7_1),
}




def 				a (     UpperCamelCase_							:				int     ,	UpperCamelCase_							:				Optional[int]     ,	UpperCamelCase_							:				Union[str, Any]		)  ->		float:
 __A	:       List[Any]       =	from_type.lower().rstrip('s'		)
 __A	:       Any       =	TYPE_CONVERSION.get(UpperCamelCase_     ,	UpperCamelCase_		)
 __A	:       Optional[int]       =	to_type.lower().rstrip('s'		)
 __A	:       Dict       =	TYPE_CONVERSION.get(UpperCamelCase_     ,	UpperCamelCase_		)
 if new_from not in METRIC_CONVERSION:
  __A	:       Optional[int]       =	(
      F"Invalid \'from_type\' value: {from_type!r}.\n"
      F"Conversion abbreviations are: {', '.join(UpperCamelCase_		)}"
  )
  raise ValueError(UpperCamelCase_		)
 if new_to not in METRIC_CONVERSION:
  __A	:       Union[str, Any]       =	(
      F"Invalid \'to_type\' value: {to_type!r}.\n"
      F"Conversion abbreviations are: {', '.join(UpperCamelCase_		)}"
  )
  raise ValueError(UpperCamelCase_		)
 return value * METRIC_CONVERSION[new_from].from_ * METRIC_CONVERSION[new_to].to


if __name__ == "__main__":
   import doctest

   doctest.testmod()













"""simple docstring"""


from __future__ import annotations

from typing import Any






class __a   :



  def __init__(self  :		Optional[Any]				,			lowercase_  :		Any				,			lowercase_  :		Any   )		->							None:  # noqa: A002
   __A	:       Optional[Any]       =	item
   __A	:       Union[str, Any]       =	next






class __a   :



  def __init__(self  :		Tuple   )		->							None:
   __A	:       Node | None       =	None
   __A	:       Dict       =	0



  def 						A_				(self  :		str				,			lowercase_  :		Any   )		->							None:
   __A	:       Dict       =	Node(lowercase_				,			self.head   )
   self.size += 1



  def 						A_				(self  :		Optional[int]   )		->							Any:
   # Switched 'self.is_empty()' to 'self.head is None'
   # because mypy was considering the possibility that 'self.head'
   # can be None in below else part and giving error
   if self.head is None:
    return None
   else:
    __A	:       Dict       =	self.head.item
    __A	:       List[str]       =	self.head.next
    self.size -= 1
    return item



  def 						A_				(self  :		List[str]   )		->							bool:
   return self.head is None



  def __str__(self  :		Any   )		->							str:
   if self.is_empty():
    return ""
   else:
    __A	:       List[str]       =	self.head
    __A	:       Union[str, Any]       =	''
    __A	:       list[str]       =	[]
    while iterate:
     item_list.append(str(iterate.item   )   )
     __A	:       List[str]       =	iterate.next

    __A	:       str       =	' --> '.join(lowercase_   )

    return item_str



  def __len__(self  :		Union[str, Any]   )		->							int:
   return self.size





