string formatting of Python

The Python string supports a simple but powerful output format that formats the output string in several ways:

1, the specified number of decimal digits for the floating-point value

2, using exponential (scientific) notation to represent floating-point numbers

3, align the decimal point of a column of numbers

4, make the output right or left justified

5, inserts a character or string at the specified position in a line of output

6, display all types of data with fixed field width and precision

Conversion indicator Symbol	Meaning
C	A single character (that is, a string of length 1), or an integer representation of an ASCII character
S	String, or a value to convert to a string
D	A value with a signed (positive negative number)
U	unsigned decimal integers
O	unsigned octal integer
X	unsigned hexadecimal integers (digits A through F are taken in lowercase)
X	unsigned hexadecimal integers (digits A through F are taken in lowercase)
F	Floating point number
E,e	Floating-point numbers (using scientific notation)
G,g	Floating-point number (with the lowest bit significant digits)

end!

string formatting of Python