如何在python中像这样分割文本文件？

Question

N-Heptane 100.20 
Hexane 86.17 
Hydrochloric Acid 36.47 
Hydrogen, H2 2.016 
Hydrogen Chloride 36.461 
Hydrogen Sulfide 34.076 
Hydroxyl, OH 17.01 
Krypton 83.80 
Methane, CH4 16.044 
Methyl Alcohol 32.04 
Methyl Butane 72.15 
Methyl Chloride 50.488 
Natural Gas 19.00 
Neon, Ne 20.179 
Nitric Oxide, NO 30.006 
Nitrogen, N2 28.0134 
Nitrous Oxide, NO2 44.012 
N-Octane 114.22 
Oxygen, O2 31.9988 
Ozone 47.998 
N-Pentane 72.15 
Iso-Pentane 72.15 
Propane, C3H8 44.097 
Propylene 42.08 

这样的文本内容，我想劈分子式字符串和分子量

如

{"Hydrogen, H2":2.016, "Hydrogen Chloride":36.461, etc........} 

Answer 1

只需遍历每一行和使用rsplit检索最后白 - 空格分隔值作为字典值。其余的线路作为关键。

d = {} 
with open(filename) as f: 
    for line in f: 
     key, value = line.rsplit(None, 1) 
     d[key] = float(value)