Python-有没有一种方法可以将数字单词转换为整数？

Python-有没有一种方法可以将数字单词转换为整数？

此代码的大部分是设置数字单词dict，仅在第一次调用时才完成。

def text2int(textnum, numwords={}):    if not numwords:      units = [        "zero", "one", "two", "three", "four", "five", "six", "seven", "eight",        "nine", "ten", "eleven", "twelve", "thirteen", "fourteen", "fifteen",        "sixteen", "seventeen", "eighteen", "nineteen",      ]      tens = ["", "", "twenty", "thirty", "forty", "fifty", "sixty", "seventy", "eighty", "ninety"]      scales = ["hundred", "thousand", "million", "billion", "trillion"]      numwords["and"] = (1, 0)      for idx, word in enumerate(units):    numwords[word] = (1, idx)      for idx, word in enumerate(tens):     numwords[word] = (1, idx * 10)      for idx, word in enumerate(scales):   numwords[word] = (10 ** (idx * 3 or 2), 0)    current = result = 0    for word in textnum.split():        if word not in numwords:          raise Exception("Illegal word: " + word)        scale, increment = numwords[word]        current = current * scale + increment        if scale > 100: result += current current = 0    return result + currentprint text2int("seven billion one hundred million thirty one thousand three hundred thirty seven")#7100031337