Python exercises-Determine if the input string is a decimal type

Write a string that can judge the input is not a decimal type
1, determine whether the number of decimal points is 1 count
2, determine if the decimal right is an integer isdigit
3, judging the left of the decimal point 1, the integer isdigit,2 If it is a negative integer, take the minus sign to the right, if it is an integer

defIs_float (s): s=Str (s)ifS.count ('.') ==1: new_s=s.split ('.') Left_num=New_s[0] Right_num=new_s[1]        ifright_num.isdigit ():ifleft_num.isdigit ():returnTrueelifLeft_num.count ('-') ==1 andLeft_num.startswith ('-'): Tmp_num=left_num.split ('-') [-1]               iftmp_num.isdigit ():returnTruereturnFalsePrint(Is_float ('-9.6')) #调用函数

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Python Exercise-judging if the input string is a decimal type