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number_to_text_mapper.py
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number_to_text_mapper.py
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class InvalidInputException(Exception):
pass
single_number_mapper = {
"0": "nul",
"1": "en",
"2": "to",
"3": "tre",
"4": "fire",
"5": "fem",
"6": "seks",
"7": "syv",
"8": "otte",
"9": "ni",
"10": "ti",
"11": "elleve",
"12": "tolv",
"13": "tretten",
"14": "fjorten",
"15": "femten",
"16": "seksten",
"17": "sytten",
"18": "atten",
"19": "nitten",
"20": "tyve",
"30": "tredive",
"40": "fyrre",
"50": "halvtreds",
"60": "treds",
"70": "halvfjerds",
"80": "firs",
"90": "halvfems"
}
def under_100(number, int_number):
# 1-10 og 20,30, ... , 90
if number in single_number_mapper:
return single_number_mapper[number]
# base number
base = str(int_number % 10)
# tens
tens = number[0] + "0"
return single_number_mapper[base] + "og" + single_number_mapper[tens]
def mapper_100s(int_number):
pre = single_number_mapper[str(int(int_number / 100))]
if pre == "en":
pre = ""
int_post_number = int(int_number % 100)
post_number = str(int_post_number)
post = under_100(post_number, int_post_number)
if post == "nul":
post = ""
else:
post = " og " + post
return pre + "hundrede" + post
def mapper_1000s(int_number):
pre = number_to_text_mapper(int(int_number / 1000))
if pre == "en":
pre = ""
else:
pre = pre + " "
post_number = int(int_number % 1000)
post = number_to_text_mapper(post_number)
if post_number < 100:
post = " og " + post
else:
post = " " + post
return pre + "tusinde" + post
def mapper_millions(int_number):
pre = number_to_text_mapper(int(int_number / 1000000))
if pre == "en":
pre = "million"
else:
pre = pre + " millioner"
post_number = int(int_number % 1000000)
post = number_to_text_mapper(post_number)
if post_number == 0:
post = ""
else:
post = " " + post
return pre + post
def number_to_text_mapper(number):
"""
Converts a number to a string representation in Danish
:param number: int or string representing the number to be converted
:return: string representation of number
"""
try:
number = str(int(number))
except ValueError:
raise InvalidInputException("Please provide a valid number as either integer or string")
int_number = int(number)
num_length = len(number)
# under 100
if num_length < 3:
return under_100(number, int_number)
# hundreds
if num_length == 3:
return mapper_100s(int_number)
# thousands
if num_length < 7:
return mapper_1000s(int_number)
# millions
if num_length < 10:
return mapper_millions(int_number)
# billion
if num_length == 10:
return "en milliard"
# More than billion is invalid input
if num_length > 10:
raise InvalidInputException("Mapper only supports numbers from 0 to 1.000.000.000 (inclusive)")
if __name__ == '__main__':
import argparse
parser = argparse.ArgumentParser()
parser.add_argument('-n', '--number', required=True, type=str, help="number to parse")
args = parser.parse_args()
print(number_to_text_mapper(args.number))