Add string to number converter

Author: AryanJadhav15

strings/min_cost_string_conversion.py

@@ -140,7 +140,9 @@ def assemble_transformation(ops: list[list[str]], i: int, j: int) -> list[str]:
             elif op[0] == "R":
                 string[i] = op[2]
 
-                file.write("%-16s" % ("Replace %c" % op[1] + " with " + str(op[2])))  # noqa: UP031
+                file.write(
+                    "%-16s" % ("Replace %c" % op[1] + " with " + str(op[2]))
+                )  # noqa: UP031
                 file.write("\t\t" + "".join(string))
                 file.write("\r\n")
 

strings/string_to_num.py

@@ -0,0 +1,190 @@
+"""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
+
+>>> to_int("Five")
+5
+>>> to_float("Five")
+5.0
+
+>>> to_int("One thousand five hundred and two")
+1502
+>>> to_float("One thousand five hundred and two")
+1502.0
+
+>>> to_int(
+...     "Ninety nine crore three lakh seventy two thousand and six point one five nine"
+... )
+990372006
+
+>>> to_float(
+...     "Ninety nine crore three lakh seventy two thousand and six point one five nine"
+... )
+990372006.159
+
+wikipedia explanation - https://en.wikipedia.org/wiki/Numeral_(linguistics)
+"""
+
+
+def to_int(word: str) -> int:
+    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,
+        }
+
+        multipliers = {
+            "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 += multipliers[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 *= multipliers[word]
+                    number += temp
+            elif word in units:
+                temp += units[word]
+            elif word in tens:
+                temp += tens[word]
+            elif word in multipliers:
+                temp *= multipliers[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: str) -> float:
+    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,
+    }
+
+    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__":
+    import doctest
+
+    doctest.testmod()
+    # 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} ")