Python Full Stack Learning summary update string: Method of String formatting

100 semicolon Mode

"""percent-semicolon mode%[(name)][flags][width]. [Precision]typecode (name) optional, used to select the specified keyflags optional, the values available for selection are: + Right-justified, positive before plus, negative numbers before plus minus;-left alignment; positive sign, negative before plus minus , white space right alignment, positive number before adding a space, negative number before plus minus, 0 right, positive before the sign, negative number before the minus sign; with 0 padding width is optional, occupy the breadth. Precision optional, the number of digits retained after the decimal point TypeCode required S, obtained Takes the return value of the __str__ method of the passed-in object, formats it to the specified position R, gets the return value of the __repr__ method of the incoming object, and formats it to the specified position C, integer: Converts the number to its Unicode corresponding value, the 10 binary range is 0 <= i <= 1114111 (PY27 only supports 0-255); character: Adds a character to a specified position o, converts an integer to an octal representation, formats it to a specified position x, converts an integer to a hexadecimal representation, and formats it to a specified position d, converting an integer, floating-point number to a decimal representation, and formats it to the specified position E, converts integers, floating-point numbers into scientific notation, and formats them into a specified position (lowercase e) e, converts integers, floating-point numbers into scientific notation, and formats them into a specified position (capital E) F, converting integers, floating-point numbers to floating-point numbers, and format it to the specified location (the default is 6 digits after the decimal point) F, ditto G, auto-adjust the integer, floating-point number conversion to float or scientific notation (more than 6 digits in scientific notation), and format it to the specified position (if the scientific count is E;) G, Auto-adjust the integer, floating-point numbers into float or scientific notation (more than 6 digits in scientific notation), and format it to a specified position (if the scientific count is e;)%, when there is a format flag in the string, you need to use a percent Represents a percent semicolon note: The format of a percent semicolon in Python does not have a way of automatically converting integers to binary representations"""msg='I am%s My age is%s'%('Tom', 18)#string concatenationmsg ='I am%s My age is%d'%('Tom', 18)#use D to represent numbersmsg ='I am% (name) s my age are% (age) S'%{'name':'Liu',' Age': 19}#through the dictionary of the situation splicingmsg ='value:%.3f'%1.56789#Stitching floating point numbermsg ='value:% (value). 4f'%{'value': 9.87654}#floating-point numbers are spliced in a dictionary formmsg ='value:%.2f%%'%50.7823#Print percent signPrint(msg)

Two format modes

"""format mode [[Fill]align][sign][#][0][width][,][.precision][type]fill] optional white space filled character align optional alignment (required with width use) <, content left-aligned, content right-aligned (default) =, content right-aligned, placing symbols to the left of the fill character, and only valid for numeric types. Even if: symbol + padding + Number ^, the content center sign "optional" has unsigned number +, plus home plus, minus negative;-, plus constant, minus negative; # "optional" for binary, octal, hexadecimal, if added #, it will show  0b/0o/0x, otherwise not displayed, "optional" adds a delimiter to the number, such as: 1,000,000width the width of the "optional" format bit. Precision "optional" decimal digit reserved Precision type "Optional" format type incoming " String Type "parameter s, format string type data blank, unspecified type, default is None, with S passed" integer type "parameter B, the 10 binary integer is automatically converted to 2 binary representation and then formatted C, the 10 binary integer is automatically converted to its corresponding Unicode character D, Decimal integer o, the 10-binary integer is automatically converted to 8 binary representation and then formatted; x, the 10-decimal integer is automatically converted to a 16-binary representation and then formatted (lowercase x) x, the 10-decimal integer is automatically converted to a 16-binary representation and then formatted (uppercase X) into the "float or decimal type" parameter E, Converted to scientific notation (lowercase e) is represented, then formatted; E, converted to scientific notation (uppercase E) is represented, then formatted; F, converted to floating point (6 bits after the default decimal point) is represented, then formatted, F, converted to floating point (the default is 6 digits after the decimal point) representation, and then formatted; Automatically toggle G in E and F, automatically toggle% in E and F, display percentages (6 digits after the decimal point by default)"""Info="I am {},my hobby is {},my age:{}". Format ('Tom','Play',' -')#format in orderinfo ="I am {3},my hobby is {1},my age:{2}". Format ('Tom','Play',' -','Qilvzhuiche')#tuple is passed, string is formatted according to the tuple indexinfo ="I am {name},my hobby is {hobby},my age:{age}". Format (name ='Tom', hobby ='Play', age = 28)#format by Assignmentinfo ="I am {name},my hobby is {hobby},my age:{age}". Format (**{"name":'Tom',"Hobby":'Play',' Age': 30})#in the form of a dress dictionary assignmentInfo="I am {0[0]}, age {0[1]}, really {1[2]}". format ([1, 2, 3], [11, 22, 33])#to value the way the list is indexed by the partyinfo ="I am {: s}, age {:d}, Money {: F}". Format ("Seven", 18, 88888.1)#tuple-specified form formattinginfo ="numbers: {: b},{:o},{:d},{:x},{:x}, {:%}". Format (15, 15, 15, 15, 15, 15.87623, 2) Info="numbers: {0:b},{0:o},{0:d},{0:x},{0:x}, {0:%}". Format (15) Info="numbers: {num:b},{num:o},{num:d},{num:x},{num:x}, {num:%}". Format (num=15)Print(info)

Python Full Stack Learning summary update string: Method of String formatting