The path to Python "third":P the Ython base of the grocery store

string Formatting

There are two ways to format a Python string: a percent-semicolon, format-mode

The percent of the semicolon is relatively old, and format is a more advanced way to replace the old way, the two coexist.

1, percent of the way

%[(name)][flags][width]. [Precision]typecode

(name) optional to select the specified key flags to choose from: + Right-aligned, positive plus, negative before plus minus;-left justified; positive front unsigned , negative number before plus minus, white space right alignment, positive before plus space, negative number before plus minus; 0 right alignment, positive sign without sign, negative before plus minus; 0 padding width .precisio         n Optional, the number of digits retained after the decimal point TypeCode required S, gets the return value of the __str__ method of the incoming object, formats it to the specified position R, gets the return value of the __repr__ method of the passed object, and formats it to the specified location C, Integer: Converts a number to its Unicode corresponding value, 10 binary range is 0 <= i <= 1114111 (py27 only supports 0-255); character: Adds a character to the specified position O, converts an integer to an octal representation, and Formats it to the specified position x, converts the integer to a hexadecimal representation, and formats it to the specified position d, converts the integer, floating-point number to a decimal representation, and formats it to the specified position E, converts the integer, floating-point number to scientific notation, and formats it to        Specifies the position (lowercase e) E, converts an integer, floating-point number to scientific notation, and formats it to the specified position (capital E) F, converts an integer, floating-point number to a floating-point number representation, and formats it to a specified position (the default is 6 digits after the decimal point) F Ibid.        G, auto-adjust convert integers, floating-point numbers to floating-point or scientific notation (more than 6 digits in scientific notation), and format them to a specified location (if scientific counts are e;)        G, auto-adjust to integers, floating-point numbers converted to floating-point or scientific notation (more than 6 digits in scientific notation), and formatted to the specified location (if the scientific count is E;) %, when there is a format flag in the string, a percent sign is requiredNote: In Python, the format of the percent semicolon does not exist in the way that an integer is converted to a binary representation 　　 

Common formatting:

msg ="I am%s My hobbby is%s"%('William','Basketball')Print(msg) Output: I am william my hobbby isbasketballmsg='I am%s, age%s'%('William', 18)Print(msg) Output: I am William, age18msg='I am% (name) s age percent (age) D'% {'name':'William',' Age': 19}Print(msg) Output: I am William age19#Print floating-point numbersTPL ="percent%.2f"% 99.97623445463344Print(TPL) output result: Percent99.98#Print PercentageTPL ="percent%.2f"% 99.97623445463344Print(TPL) output result: Percent99.98%msg='I am% (name) +60s my hobby is basketball.'% {'name':'William'}Print(msg) Output: I am william my hobby isbasketball.msg='I am \033[43;1m% (name) +60s\033[0m my hobby is basketball.'% {'name':'William'}Print(msg) Output: I am william my hobby isbasketball.Print('Root','x','0','0', sep=':') Output Result: root:x:0:0

2, format mode expression:

[fill]align][sign][#][0][width][,][.precision][type]

Common formatting:

msg ='I am {},age {}, {}'. Format ('Zhurui', 24,'William')Print(msg) Output: I am zhurui,age24, Williammsg='I am {},age {}, {}'. Format (*['Zhurui', 24,'William'])Print(msg) Output: I am zhurui,age24, Williammsg='I am {0}, age {1},really {0}'. Format ('Zhurui', 24)Print(msg) Output: I am Zhurui, age24, really zhuruimsg='I am {0}, age {1},really {0}'. Format (*['Zhurui', 24])Print(msg) Output: I am Zhurui, age24, really zhuruimsg='I am {name}, age {age},really {name}'. Format (name='William', age=24)Print(msg) Output: I am William, age24, really williammsg='I am {name}, age {age},really {name}'. Format (**{'name':'William',' Age': 24})#format if you use a dictionary, the front plus * *Print(msg) Output: I am William, age24, really williammsg='i am{0[0]}, age {0[1]}, really {0[2]}'. format ([1, 2, 3], [11, 22, 33])Print(msg) Output: I am1, age2, really 3msg='I am {: s}, age {:d}, Money {: F}'. Format ('William', 24,89.3432)Print(msg) Output: I am William, age89.343200, Moneymsg='I am {: s},age {:d}'. Format (*['William', 24])Print(msg) Output: I am william,age24msg='I am {name:s},age {age:d}'. Format (**{'name':'William',' Age': 24})Print(msg) Output: I am william,age24msg="numbers: {: b},{:o},{:d},{:x},{:x}, {:%}". Format (15, 15, 15, 15, 15, 15.87623, 2)Print(msg) Output: Numbers:1111,17,15,f,f, 1587.623%msg="numbers: {: b},{:o},{:d},{:x},{:x}, {:%}". Format (15, 15, 15, 15, 15, 15.87623, 2) Output Result: Numbers:1111,17,15,f,f, 1587.623%msg="numbers: {0:b},{0:o},{0:d},{0:x},{0:x}, {0:%}". Format (15)Print(msg) Output: Numbers:1111,17,15,f,f, 1500%msg="numbers: {num:b},{num:o},{num:d},{num:x},{num:x}, {num:%}". Format (num=15)Print(msg) Output: Numbers:1111,17,15,f,f, 1500%

The path to Python "third":P the Ython base of the grocery store