有内置的方法来检查字符串是否可以转换为浮点数吗? [英] Is there built-in way to check if string can be converted to float?

问题描述

我知道有多种方法可以检查是否可以使用try-except或正则表达式转换str，但是我一直在寻找(例如)str方法，例如

I know there are ways to check if str can be converted using try-except or regular expressions, but I was looking for (for example) str methods such as

str.isnumeric()
str.isdigit()
str.isdecimal() # also doesn't work for floats

但是找不到任何东西.我还没有找到吗?

but could't find any. Are there any I haven't found yet?

推荐答案

如 Macattack 和 Jab ，您可以使用 try ，您可以在 w3school的教程.

As stated by and Macattack and Jab, you could use try except, which you can read about in python's docs or w3school's tutorial.

Try Except子句的格式为:

Try Except clauses have the form:

try:
    # write your code
    pass
except Exception as e: # which can be ValueError, or other's exceptions
    # deal with Exception, and it can be called using the variable e
    print(f"Exception was {e}") # python >= 3.7
    pass
except Exception as e: # for dealing with other Exception
    pass
# ... as many exceptions you would need to handle
finally:
    # do something after dealing with the Exception
    pass

有关内置异常的列表，请参见 python的文档.

For a list of built-in Exceptions, see python's docs.

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