将Python的字符串列表转换为浮点数,其中列表还包含单词 [英] Convert Python list of strings into floats, where list also contains words
本文介绍了将Python的字符串列表转换为浮点数,其中列表还包含单词的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
例如,考虑Python中包含字母和数字字符串的列表
a = ['Total','1 ','4','5','2']
如何转换这到混合值列表
$ $ p $ $ $ c $ b = ['Total',1.0,4.0,5.0,2.0]
请注意,一般来说,我们可能不知道字符串在列表中的位置,即可能有
a = ['Total','1','4','Next','2']
$ c
$解析方案您可以使用一个生成器函数和异常处理:
>>> def func(seq):
for x in seq:
try:
yield float(x)
除ValueError:
yield x
...
>>> a = ['Total','1','4','5','2']
>>> list(func(a))
['Total',1.0,4.0,5.0,2.0]
Consider for example the list in Python containing both strings of letters and numbers
a = ['Total', '1', '4', '5', '2']
How would it be possible to convert this into the mixed value list
b = ['Total', 1.0, 4.0, 5.0, 2.0]
Note that in general we may not know where the letters string will be in the list i.e. we might have
a = ['Total', '1', '4', 'Next', '2']
解决方案 You can use a generator function and exception handling:
>>> def func(seq):
for x in seq:
try:
yield float(x)
except ValueError:
yield x
...
>>> a = ['Total', '1', '4', '5', '2']
>>> list(func(a))
['Total', 1.0, 4.0, 5.0, 2.0]
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