python convert string to integer using base

PYTHON CONVERT STRING TO INTEGER USING BASE CODE

PYTHON CONVERT STRING TO INTEGER USING BASE CODE

On my own PC, this code was able to complete 10 million iterations using the input range, 0-9999, and base, 36, in consistently below 5 seconds. Num //= base # move to next digit to the left def int2base(num, base, abc='0123456789abcdefghijklmnopqrstuvwxyz'):

Simply put, it works by first taking an integer, base, and an optional accompanying string of numerals, then calculating each digit of the converted integer beginning with the least significant. To solve this ValueError: invalid literal for int () with base 10: ‘Hello’, we need to pass an integer value as a string to the variable value, then it will convert the variable into an int using the built-in int () function. Believe it or not, the following is some ported and modified Scratch code I wrote nearly three years ago to see just how quickly I could convert from denary to hexadecimal. Looks like this might be my time to shine.

Structure.append(acceptable_digit if acceptable_digit = 2 and = 2 and <= 36') Raise InvalidBaseError('Invalid value: '.format(number))Īcceptable_digit = int(number / (base ** floor(logarithm))) If 1 >= base or base >= len(_alphanumerals) or not floor(base) = base: #getvalue is also a personal function to replicate int(number, base) from math import log, ceil, floorĬlass FloatConvertError(ValueError): passĬlass IncorrectBaseError(ValueError): passĭef getbase(number, base=2, frombase = 10): On top of this, there are a couple of other ways as well. The simplest way to do this is using the basic str (), int (), and float () functions. I had once written my own function with the same goal but is now embarrassingly complicated. Introduction Python allows you to convert strings, integers, and floats interchangeably in a few different ways. > str_base(734,symbol_space).rjust(6,symbol_space) > str_base(734,symbol_space).rjust(0,symbol_space) To convert an integer to a string, the argument should be an integer value. If you want to padd with the propper zero symbol you can use symbol_space = 'abcdest' That lead's to following output > str_base(13,'01') > other math if you use binary, oct or hex -> diff in unsigned & signed values def str_base(number, base): This function accepts two parameters, one is the string in quotes and the second is an optional base to represent the data. I also ignored negativ values just for shortness and the fact that's mathematical incorrect Use Python int () function to convert a string value to integer in Python. I'd like to come up with a little change (I used) to convert decimal to a base of symbolspace It helped me a lot to prototype an algortithm I had to implement in C If you had to name base-5 numbers it would probably be called pental.The above answers are really nice. Int(string, 5) then interprets the string as a base-5 number, and will produce a Python integer to reflect its value: > int('13', 5) # one time 5, 3 times 1 = 8 The decimal number 10 would be 20 in base 5, for example (2 times 5). Base 5 means the number is expressed using digits 0 through to 4. The base argument is just the integer base, and it is not limited to 2, 8, 10 or 16. In binary there are only two digits, so after 1 you count up to 10, which is one time two, and zero times one, and after 11 you count up to 100. Count past 99 and you add a 3rd digit, etc. The base can be between 2 (you need to have at least 2 different values) and 36 (numbers + letters). But this function has the second default parameter: base. In decimal we count up to 9, then add a position to count the 'tens', so 10 means one times ten, zero times one. The int () function in Python converts a string to an integer. hexadecimal is base 16 (0 through to 9, then A, B, C, D, E, F).Įach base determines how many values each 'position' in the notation can take.decimal is what is used in daily (western) life to talk about integers, which is base 10 (0 through to 9).octal represents a number in base 8 (0, 1, 2, 3, 4, 5, 6 and 7).binary represents a number in base 2 (0 and 1).You are probably familiar with binary and hexadecimal, and perhaps octal these are just ways of noting an integer number in different bases: Int(string, base) accepts an arbitrary base.

Python convert string to integer using base