Add string to number converter

Author: AryanJadhav15

strings/string_to_num.py

@@ -0,0 +1,107 @@
+''' Converts a given string to integer and float
+    This works with only Indian system of wording
+    
+     * Indian system uses crore, lakh, thousand and not million and billions
+    
+    For the part after the decimal example ( .159 ):
+	 * 	Digit by digit ( .159 ) -> point one five nine is allowed anything else will throw an
+        error
+     
+    >>> "Five"
+        out:- <class 'int'>  --> 5
+        out:- <class 'float'>  --> 5.0
+        
+    >>> "One thousand five hundred and two"
+        out:- <class 'int'>  --> 1502
+        out:- <class 'float'>  --> 1502.0
+        
+    >>> "Ninety nine crore three lakh seventy two thousand and six point one five nine"
+        out:- <class 'int'>  --> 990372006
+        out:- <class 'float'>  --> 990372006.159
+        
+'''
+
+def to_int(word):
+    
+    if len(word.strip())>0:
+        units = {"zero":0,"one":1,"two":2,"three":3,"four":4,"five":5,"six":6,"seven":7,"eight":8,"nine":9,"eleven":11,"twelve":12,"thirteen":13,"fourteen":14,"fifteen":15,"sixteen":16,"seventeen":17,"eighteen":18,"nineteen":19}
+        
+        tens = {"ten":10,"twenty":20,"thirty":30,"forty":40,"fifty":50,"sixty":60,"seventy":70,"eighty":80,"ninety":90}
+        
+        multiplyers = {"hundred":100,"thousand":1_000,"lakh":1_00_000,"crore":1_00_00_000}
+        
+        if "point" in word:
+            word_lst = word.split("point")
+            word = "".join(word_lst[:-1])
+            
+        words = word.strip().replace(" and","").replace("-","").replace("_","").lower().split()
+        
+        number = 0 #
+        temp = 0 #
+        
+        for index,word in enumerate(words):
+            if index == 0:
+                if word in units:
+                    temp += units[word]
+                elif word in tens:
+                    temp += tens[word]
+                else:
+                    temp += multiplyers[word]
+            elif index == (len(words)-1):
+                if word in units:
+                    temp += units[word]
+                    number += temp
+                elif word in tens:
+                    temp += tens[word]
+                    number += temp
+                else:
+                    temp *= multiplyers[word]
+                    number += temp
+            elif word in units:
+                temp += units[word]
+            elif word in tens:
+                temp += tens[word]
+            elif word in multiplyers:
+                temp *= multiplyers[word]
+                number += temp
+                temp = 0
+                
+        if len(words)>1:       
+            return(number)
+        else:
+            return(temp)
+    else:
+        raise ValueError("Empty input is not a valid number in words")
+
+def to_float(word):
+    units = {"zero":0,"one":1,"two":2,"three":3,"four":4,"five":5,"six":6,"seven":7,"eight":8,"nine":9,"eleven":11,"twelve":12,"thirteen":13,"fourteen":14,"fifteen":15,"sixteen":16,"seventeen":17,"eighteen":18,"ninteen":19}
+     
+    all_words = word.strip().replace(" and","").replace("-","").replace("_","").lower().split("point")
+    if len(all_words)>1:
+        word = all_words[0]
+        after_point = all_words[1].split()
+        
+        integer_part = to_int(word)
+
+        decimal_part = ""
+        for num in after_point:
+            if num in units:
+                decimal_part += str(units[num])   
+        
+        str_float = str(integer_part) + str(decimal_part)
+        divider = ("1" + ("0" * len(after_point)))
+        return (int(str_float)/int(divider))
+    
+    else:
+        return(float(to_int(word)))
+
+if __name__ == "__main__":
+    while True:
+        word = input("Enter a number in words (q to quit) :- ").lower().strip()
+        if word == "q":
+            break
+        else:
+            integer = to_int(word)
+            print(f"\nThe number in {type(integer)} --> {integer} ")
+            floater = to_float(word)
+            print(f"\nThe number in {type(floater)} --> {floater} ")