使用D而不是E的Python科学记数法 [英] Python scientific notation using D instead of E

问题描述

Fortran程序生成的某些结果文件使用字母D代替E报告双精度数字(科学计数法)，例如:

Some results file produced by Fortran programs report double precision numbers (in scientific notation) using the letter D instead of E, for instance:

1.2345D+02
# instead of
1.2345E+02

我需要使用Python处理大量数据，我才意识到它无法读取D表示法中的数字，例如:

I need to process huge amounts of this data using Python, and I just realized it cannot read the numbers in the D notation, for instance:

>>> A = 1.0D+01
  File "<stdin>", line 1
    A = 1.0D+01
           ^
SyntaxError: invalid syntax

我可以更改语言环境并让Python知道D表示E吗?我真的不想进行全局搜索和替换！

Can I change my locale and let Python know that D means E? I really would not want to make a global search-and-replace!

推荐答案

在Python程序中，最简单的方法就是在解释每个条目之前添加一个步骤:

The simplest way, from your Python program, would be just to add a step before you interpret each entry:

>>> val = "1.5698D+03"  # 1,569.8
>>> print float(val.replace('D', 'E'))
1569.8

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