GC analyzer

rosalind_gc.py

#!/usr/bin/env python3
"""takes in a DNA string and outputs GC content."""


class RosalindAnalyzer:
    # takes in a string, returns a decimal representing the GC content of the string to 3 decimal places.
    @staticmethod
    def Analyzer(inStr: str):
        GCString = "";
        for char in inStr:
            if char in ("G", "C"):
            # in the future I can simply use str.count("G") and str.count("C") to get the number of Gs and Cs in the string.
                GCString += char;
        # formats to 3rd decimal place.
        return f"{(len(GCString) / len(inStr)) * 100:.3f}";

print("Input a DNA string, and this program will return the GC content of it.");
string = input();
string = string.upper();
print(f'recieved: "{string[0:10]}..."');
print(f'The GC content of the string is, "{RosalindAnalyzer.Analyzer(string)}%"');