# Is there a way to convert number words to Integers?

The majority of this code is to set up the numwords dict, which is only done on the first call.

``````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 + current

print text2int("seven billion one hundred million thirty one thousand three hundred thirty seven")
#7100031337
``````