错误：DeprecationWarning: The default dtype for empty Series will be ‘object‘ instead of ‘float64‘ in

在使用python时，直接使用

a = pd.Series()

创建series时会报错

DeprecationWarning: The default dtype for empty Series will be 'object' instead of 'float64' in a future version. Specify a dtype explicitly to silence this warning. after removing the cwd from sys.path.

修改为如下即可

a = pd.Series([], dtype='float64')