Python基础教程-python实现将英文单词表示的数字转换成阿拉伯数字的方法详细介绍

python实现将英文单词表示的数字转换成阿拉伯数字的方法是如何来实现的呢?本python基础教程将会通过具体的实例来演示python实现将英文单词表示的数字转换成阿拉伯数字的方法的实现方法及相关技巧:

本文实例讲述了python实现将英文单词表示的数字转换成阿拉伯数字的方法。分享给大家供大家参考。具体实现方法如下:

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import re
_known = {
  'zero': 0,
  'one': 1,
  'two': 2,
  'three': 3,
  'four': 4,
  'five': 5,
  'six': 6,
  'seven': 7,
  'eight': 8,
  'nine': 9,
  'ten': 10,
  'eleven': 11,
  'twelve': 12,
  'thirteen': 13,
  'fourteen': 14,
  'fifteen': 15,
  'sixteen': 16,
  'seventeen': 17,
  'eighteen': 18,
  'nineteen': 19,
  'twenty': 20,
  'thirty': 30,
  'forty': 40,
  'fifty': 50,
  'sixty': 60,
  'seventy': 70,
  'eighty': 80,
  'ninety': 90
  }
def spoken_word_to_number(n):
  """Assume n is a positive integer".
assert _positive_integer_number('nine hundred') == 900
assert spoken_word_to_number('one hundred') == 100
assert spoken_word_to_number('eleven') == 11
assert spoken_word_to_number('twenty two') == 22
assert spoken_word_to_number('thirty-two') == 32
assert spoken_word_to_number('forty two') == 42
assert spoken_word_to_number('two hundred thirty two') == 232
assert spoken_word_to_number('two thirty two') == 232
assert spoken_word_to_number('nineteen hundred eighty nine') == 1989
assert spoken_word_to_number('nineteen eighty nine') == 1989
assert spoken_word_to_number('one thousand nine hundred and eighty nine') == 1989
assert spoken_word_to_number('nine eighty') == 980
assert spoken_word_to_number('nine two') == 92 # wont be able to convert this one
assert spoken_word_to_number('nine thousand nine hundred') == 9900
assert spoken_word_to_number('one thousand nine hundred one') == 1901
"""

  n = n.lower().strip()
  if n in _known:
    return _known[n]
  else:
    inputWordArr = re.split('[ -]', n)
  assert len(inputWordArr) > 1 #all single words are known
  #Check the pathological case where hundred is at the end or thousand is at end
  if inputWordArr[-1] == 'hundred':
    inputWordArr.append('zero')
    inputWordArr.append('zero')
  if inputWordArr[-1] == 'thousand':
    inputWordArr.append('zero')
    inputWordArr.append('zero')
    inputWordArr.append('zero')
  if inputWordArr[0] == 'hundred':
    inputWordArr.insert(0, 'one')
  if inputWordArr[0] == 'thousand':
    inputWordArr.insert(0, 'one')
  inputWordArr = [word for word in inputWordArr if word not in ['and', 'minus', 'negative']]
  currentPosition = 'unit'
  prevPosition = None
  output = 0
  for word in reversed(inputWordArr):
    if currentPosition == 'unit':
      number = _known[word]
      output += number
      if number > 9:
        currentPosition = 'hundred'
      else:
        currentPosition = 'ten'
    elif currentPosition == 'ten':
      if word != 'hundred':
        number = _known[word]
        if number < 10:
          output += number*10
        else:
          output += number
      #else: nothing special
      currentPosition = 'hundred'
    elif currentPosition == 'hundred':
      if word not in [ 'hundred', 'thousand']:
        number = _known[word]
        output += number*100
        currentPosition = 'thousand'
      elif word == 'thousand':
        currentPosition = 'thousand'
      else:
        currentPosition = 'hundred'
    elif currentPosition == 'thousand':
      assert word != 'hundred'
      if word != 'thousand':
        number = _known[word]
        output += number*1000
    else:
      assert "Can't be here" == None
  return(output)

对于python实现将英文单词表示的数字转换成阿拉伯数字的方法就是这样,欢迎大家参考python基础教程系类的其它介绍。。。。

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