code: 
  """simple docstring"""
  def     __lowerCamelCase  (		UpperCamelCase__      ):
  
  
   """simple docstring"""
  
  
  
  
  
  
   _UpperCAmelCase =						1
   _UpperCAmelCase =						0
   _UpperCAmelCase =						1
   _UpperCAmelCase =						1
   _UpperCAmelCase =						3
   _UpperCAmelCase =						3
   _UpperCAmelCase =						limit
   _UpperCAmelCase =						0
  
   _UpperCAmelCase =						""
   while counter != decimal + 1:
    if 4 * q + r - t < n * t:
     result += str(UpperCamelCase__      )
     if counter == 0:
      result += "."
  
     if decimal == counter:
      break
  
     counter += 1
     _UpperCAmelCase =						10 * (r - n * t)
     _UpperCAmelCase =						((10 * (3 * q + r)) // t) - 10 * n
     q *= 10
     _UpperCAmelCase =						nr
    else:
     _UpperCAmelCase =						(2 * q + r) * l
     _UpperCAmelCase =						(q * (7 * k) + 2 + (r * l)) // (t * l)
     q *= k
     t *= l
     l += 2
     k += 1
     _UpperCAmelCase =						nn
     _UpperCAmelCase =						nr
   return result
  
  
  
  
  def     __lowerCamelCase  (		):
  
  
   """simple docstring"""
  
  
  
  
  
  
   print(f"{calculate_pi(50      ) = }"      )
   import doctest
  
   doctest.testmod()
  
  
  if __name__ == "__main__":
     main()
  
  
  
  
  
style_context: 
  """simple docstring"""
  from typing import TYPE_CHECKING
  
  from ...utils import OptionalDependencyNotAvailable, _LazyModule, is_sentencepiece_available, is_tokenizers_available
  
  
  __magic_name__		       =				{}
  
  try:
  			if not is_sentencepiece_available():
  						raise OptionalDependencyNotAvailable()
  except OptionalDependencyNotAvailable:
  			pass
  else:
  			__magic_name__		       =				['''CpmTokenizer''']
  
  try:
  			if not is_tokenizers_available():
  						raise OptionalDependencyNotAvailable()
  except OptionalDependencyNotAvailable:
  			pass
  else:
  			__magic_name__		       =				['''CpmTokenizerFast''']
  
  
  if TYPE_CHECKING:
  			try:
  						if not is_sentencepiece_available():
  									raise OptionalDependencyNotAvailable()
  			except OptionalDependencyNotAvailable:
  						pass
  			else:
  						from .tokenization_cpm import CpmTokenizer
  
  			try:
  						if not is_tokenizers_available():
  									raise OptionalDependencyNotAvailable()
  			except OptionalDependencyNotAvailable:
  						pass
  			else:
  						from .tokenization_cpm_fast import CpmTokenizerFast
  
  else:
  			import sys
  
  			__magic_name__		       =				_LazyModule(__name__, globals()['''__file__'''], _import_structure, module_spec=__spec__)
  
  
  
  
  