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#!/usr/bin/env python
# numberparser.py - Translate words to decimal
# This is part of Kaylee
# -- this code is licensed GPLv3
# Copyright 2015 Clayton G. Hobbs
# Portions Copyright 2013 Jezra
import re
# Define the mappings from words to numbers
class NumberParser:
zero = {
'zero': 0
}
ones = {
'one': 1,
'two': 2,
'three': 3,
'four': 4,
'five': 5,
'six': 6,
'seven': 7,
'eight': 8,
'nine': 9
}
special_ones = {
'ten': 10,
'eleven': 11,
'twelve': 12,
'thirteen': 13,
'fourteen': 14,
'fifteen': 15,
'sixteen': 16,
'seventeen': 17,
'eighteen': 18,
'ninteen': 19
}
tens = {
'twenty': 20,
'thirty': 30,
'fourty': 40,
'fifty': 50,
'sixty': 60,
'seventy': 70,
'eighty': 80,
'ninty': 90
}
hundred = {
'hundred': 100
}
exp = {
'thousand': 1000,
'million': 1000000,
'billion': 1000000000
}
allowed = [
'and'
]
def __init__(self):
self.number_words = []
for word in sorted(self.zero.keys()):
self.number_words.append(word)
for word in sorted(self.ones.keys()):
self.number_words.append(word)
for word in sorted(self.special_ones.keys()):
self.number_words.append(word)
for word in sorted(self.tens.keys()):
self.number_words.append(word)
for word in sorted(self.hundred.keys()):
self.number_words.append(word)
for word in sorted(self.exp.keys()):
self.number_words.append(word)
self.mandatory_number_words = self.number_words.copy()
for word in sorted(self.allowed):
self.number_words.append(word)
def parse_number(self, text_line):
"""
Parse numbers from natural language into ints
TODO: Throw more exceptions when invalid numbers are detected. Only
allow certian valueless words within numbers. Support zero.
"""
value = 0
partial_value = 0
last_list = None
# Split text_line by commas, whitespace, and hyphens
text_line = text_line.strip()
text_words = re.split(r'[,\s-]+', text_line)
# Parse the number
for word in text_words:
if word in self.zero:
if last_list is not None:
raise ValueError('Invalid number')
value = 0
last_list = self.zero
elif word in self.ones:
if last_list in (self.zero, self.ones, self.special_ones):
raise ValueError('Invalid number')
value += self.ones[word]
last_list = self.ones
elif word in self.special_ones:
if last_list in (self.zero, self.ones, self.special_ones, self.tens):
raise ValueError('Invalid number')
value += self.special_ones[word]
last_list = self.special_ones
elif word in self.tens:
if last_list in (self.zero, self.ones, self.special_ones, self.tens):
raise ValueError('Invalid number')
value += self.tens[word]
last_list = self.tens
elif word in self.hundred:
if last_list not in (self.ones, self.special_ones, self.tens):
raise ValueError('Invalid number')
value *= self.hundred[word]
last_list = self.hundred
elif word in self.exp:
if last_list in (self.zero, self.exp):
raise ValueError('Invalid number')
partial_value += value * self.exp[word]
value = 0
last_list = self.exp
elif word not in self.allowed:
raise ValueError('Invalid number')
# Debugging information
#print(word, value, partial_value)
# Finish parsing the number
value += partial_value
return value
def parse_all_numbers(self, text_line):
nums = []
t_numless = ''
current_num = ''
# Split text_line by commas, whitespace, and hyphens
text_line = text_line.strip()
text_words = re.split(r'[,\s-]+', text_line)
for word in text_words:
# If we aren't starting a number, add the word to the result string
if word not in self.mandatory_number_words:
if current_num:
if word in self.number_words:
current_num += word + ' '
else:
try:
nums.append(self.parse_number(current_num))
except ValueError:
nums.append(-1)
current_num = ''
t_numless += '%d' + ' '
if not current_num:
t_numless += word + ' '
else:
# We're parsing a number now
current_num += word + ' '
if current_num:
try:
nums.append(self.parse_number(current_num))
except ValueError:
nums.append(-1)
current_num = ''
t_numless += '%d' + ' '
return (t_numless.strip(), nums)
if __name__ == '__main__':
np = NumberParser()
# Get the words to translate
text_line = input('Enter a number: ')
# Parse it to an integer
value = np.parse_all_numbers(text_line)
# Print the result
print('I claim that you meant the decimal number', value)
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