Is there a way to convert number words to Integers?

Question

I need to convert one into 1, two into 2 and so on.

Is there a way to do this with a library or a class or anythi

Answer 1

I have just released a python module to PyPI called word2number for the exact purpose. https://github.com/akshaynagpal/w2n

Install it using:

pip install word2number

make sure your pip is updated to the latest version.

Usage:

from word2number import w2n

print w2n.word_to_num("two million three thousand nine hundred and eighty four")
2003984

Answer 2

This could be easily be hardcoded into a dictionary if there's a limited amount of numbers you'd like to parse.

For slightly more complex cases, you'll probably want to generate this dictionary automatically, based on the relatively simple numbers grammar. Something along the lines of this (of course, generalized...)

for i in range(10):
   myDict[30 + i] = "thirty-" + singleDigitsDict[i]

If you need something more extensive, then it looks like you'll need natural language processing tools. This article might be a good starting point.

Answer 3

This code works for a series data:

import pandas as pd
mylist = pd.Series(['one','two','three'])
mylist1 = []
for x in range(len(mylist)):
    mylist1.append(w2n.word_to_num(mylist[x]))
print(mylist1)

Answer 4

Here's the trivial case approach:

>>> number = {'one':1,
...           'two':2,
...           'three':3,}
>>> 
>>> number['two']
2

Or are you looking for something that can handle "twelve thousand, one hundred seventy-two"?

Answer 5

I needed something a bit different since my input is from a speech-to-text conversion and the solution is not always to sum the numbers. For example, "my zipcode is one two three four five" should not convert to "my zipcode is 15".

I took Andrew's answer and tweaked it to handle a few other cases people highlighted as errors, and also added support for examples like the zipcode one I mentioned above. Some basic test cases are shown below, but I'm sure there is still room for improvement.

def is_number(x):
    if type(x) == str:
        x = x.replace(',', '')
    try:
        float(x)
    except:
        return False
    return True

def text2int (textnum, 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']
    ordinal_words = {'first':1, 'second':2, 'third':3, 'fifth':5, 'eighth':8, 'ninth':9, 'twelfth':12}
    ordinal_endings = [('ieth', 'y'), ('th', '')]

    if not numwords:
        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)

    textnum = textnum.replace('-', ' ')

    current = result = 0
    curstring = ''
    onnumber = False
    lastunit = False
    lastscale = False

    def is_numword(x):
        if is_number(x):
            return True
        if word in numwords:
            return True
        return False

    def from_numword(x):
        if is_number(x):
            scale = 0
            increment = int(x.replace(',', ''))
            return scale, increment
        return numwords[x]

    for word in textnum.split():
        if word in ordinal_words:
            scale, increment = (1, ordinal_words[word])
            current = current * scale + increment
            if scale > 100:
                result += current
                current = 0
            onnumber = True
            lastunit = False
            lastscale = False
        else:
            for ending, replacement in ordinal_endings:
                if word.endswith(ending):
                    word = "%s%s" % (word[:-len(ending)], replacement)

            if (not is_numword(word)) or (word == 'and' and not lastscale):
                if onnumber:
                    # Flush the current number we are building
                    curstring += repr(result + current) + " "
                curstring += word + " "
                result = current = 0
                onnumber = False
                lastunit = False
                lastscale = False
            else:
                scale, increment = from_numword(word)
                onnumber = True

                if lastunit and (word not in scales):                                                                                                                                                                                                                                         
                    # Assume this is part of a string of individual numbers to                                                                                                                                                                                                                
                    # be flushed, such as a zipcode "one two three four five"                                                                                                                                                                                                                 
                    curstring += repr(result + current)                                                                                                                                                                                                                                       
                    result = current = 0                                                                                                                                                                                                                                                      

                if scale > 1:                                                                                                                                                                                                                                                                 
                    current = max(1, current)                                                                                                                                                                                                                                                 

                current = current * scale + increment                                                                                                                                                                                                                                         
                if scale > 100:                                                                                                                                                                                                                                                               
                    result += current                                                                                                                                                                                                                                                         
                    current = 0                                                                                                                                                                                                                                                               

                lastscale = False                                                                                                                                                                                                              
                lastunit = False                                                                                                                                                
                if word in scales:                                                                                                                                                                                                             
                    lastscale = True                                                                                                                                                                                                         
                elif word in units:                                                                                                                                                                                                             
                    lastunit = True

    if onnumber:
        curstring += repr(result + current)

    return curstring

Some tests...

one two three -> 123
three forty five -> 345
three and forty five -> 3 and 45
three hundred and forty five -> 345
three hundred -> 300
twenty five hundred -> 2500
three thousand and six -> 3006
three thousand six -> 3006
nineteenth -> 19
twentieth -> 20
first -> 1
my zip is one two three four five -> my zip is 12345
nineteen ninety six -> 1996
fifty-seventh -> 57
one million -> 1000000
first hundred -> 100
I will buy the first thousand -> I will buy the 1000  # probably should leave ordinal in the string
thousand -> 1000
hundred and six -> 106
1 million -> 1000000

Answer 6

This code works only for numbers below 99.
both word to Int and int to word.
(for rest need to implement 10-20 lines of code and simple logic. This is just simple code for beginners)


num=input("Enter the number you want to convert : ")
mydict={'1': 'One', '2': 'Two', '3': 'Three', '4': 'Four', '5': 'Five','6': 'Six', '7': 'Seven', '8': 'Eight', '9': 'Nine', '10': 'Ten','11': 'Eleven', '12': 'Twelve', '13': 'Thirteen', '14': 'Fourteen', '15': 'Fifteen', '16': 'Sixteen', '17': 'Seventeen', '18': 'Eighteen', '19': 'Nineteen'}
mydict2=['','','Twenty','Thirty','Fourty','fifty','sixty','Seventy','Eighty','Ninty']
if num.isdigit():
    if(int(num)<20):
        print(" :---> "+mydict[num])
    else:
            var1=int(num)%10
            var2=int(num)/10
            print(" :---> "+mydict2[int(var2)]+mydict[str(var1)])
else:
    num=num.lower();
    dict_w={'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'}
    mydict2=['','','twenty','thirty','fourty','fifty','sixty','seventy','eighty','ninty']
    divide=num[num.find("ty")+2:]
    if num:
        if(num in dict_w.keys()):
            print(" :---> "+str(dict_w[num]))
        elif divide=='' :
                for i in range(0, len(mydict2)-1):
                   if mydict2[i] == num:
                      print(" :---> "+str(i*10))
        else :
            str3=0
            str1=num[num.find("ty")+2:]
            str2=num[:-len(str1)]
            for i in range(0, len(mydict2) ):
                if mydict2[i] == str2:
                    str3=i;
            if str2 not in mydict2:
                print("----->Invalid Input<-----")                
            else:
                try:
                    print(" :---> "+str((str3*10)+dict_w[str1]))
                except:
                    print("----->Invalid Input<-----")
    else:
            print("----->Please Enter Input<-----")