ValueError: could not convert string to float: '91.67%'

Null is a value that represents the absence of a value or a lack of a value. It is often used to indicate that a variable or field has not been assigned a value or that a condition is not applicable or cannot be determined. In programming, null is often used as a placeholder or default value for variables or objects. In databases, null is used to represent missing or unknown data.

相关问题

ValueError: could not convert string to float: 'admin.'

This error is likely occurring because you are trying to convert the string 'admin.' to a float using a method such as float('admin.'). This is not possible because 'admin.' is not a valid float value.

To resolve this error, you need to ensure that you are only trying to convert valid float values to floats. Check the data you are working with to make sure that all values that you are attempting to convert to floats are actually numeric values. If there are non-numeric values mixed in with your data, you will need to clean or filter the data before attempting to convert it to floats.

ValueError: could not convert string to float: '.3f'

当使用`float()`函数将字符串转换为浮点数时，如果字符串不满足数值型的要求，就会抛出`ValueError`异常。在你提供的例子中，`ValueError`的提示是"could not convert string to float: '.3f'"。这是因为字符串".3f"不是一个有效的浮点数表示形式。

为了解决这个问题，你需要确保要转换的字符串是一个有效的数值型字符串。例如，可以使用`try...except`语句来处理可能抛出的`ValueError`异常，并提供相应的错误处理逻辑。