#!/usr/bin/python3 #-*- coding:utf-8 -*- "计算蛋白质的质量" table = { ‘A‘: 71.03711, ‘C‘: 103.00919, ‘D‘: 115.02694, ‘E‘: 129.04259, ‘F‘: 147.06841, ‘G‘: 57.02146, ‘H‘: 137.05891, ‘I‘: 113.08406, ‘K‘: 128.09496, ‘L‘: 113.08406, ‘M‘: 131.04049, ‘N‘: 114.04293, ‘P‘: 97.05276, ‘Q‘: 128.05858, ‘R‘: 156.10111, ‘S‘: 87.03203, ‘T‘: 101.04768, ‘V‘: 99.06841, ‘W‘: 186.07931, ‘Y‘: 163.06333 } import sys #f=open(‘./protein.txt‘, ‘r‘) f=open(sys.argv[1]) string =f.read() weight = 0 for i in string: if i in table.keys(): weight += table[i] print (weight) f.close()
用法：
python3 proweight.py filename