"Reprint" Python%s%d%f

%s string

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2. string= "Hello"     
6. #%s The result is hello when printing   
8. Print "string=%s" % string # Output:string=hello
12. #%2s means that the string length is 2, and when the original string is longer than 2 o'clock, it is printed at the original length, so the%2s print result is still Hello   
14. Print "string=%2s" % string # Output:string=hello
18. #%7s means the string length is 7, when the length of the original string is less than 7 o'clock, the left side of the original string is blank,   
20. #所以%7s Print result is Hello   
22. Print "string=%7s" % string # output:string= Hello
26. #%-7s means string length is 7, when the length of the original string is less than 7 o'clock, the right side of the original string to fill the space,   
28. #所以%-7s Print result is Hello   
30. Print "string=%-7s!" % String  # Output:string=hello!   
34. #%.2s means to intercept the first 2 characters of a string, so%.2s prints the result of the He   
36. Print "string=%.2s" % string # output:string=he
40. #%.7s means to intercept the first 7 characters of a string, which is the string itself when the original string is less than 7 o'clock long .   
42. #所以%.7s Print result is Hello   
44. Print "string=%.7s" % string # Output:string=hello
48. #%a.bs This format is a synthesis of the above two formats, starting with the number B after the decimal point to intercept the string,   
50. #当截取的字符串长度小于a时, you also need to fill the left side of the space   
52. Print "string=%7.2s" % string # output:string= He
54. Print "string=%2.7s" % string # Output:string=hello
56. Print "string=%10.7s" % string # output:string= Hello
60. #还可以用%*.*s to represent precision, the values of two * are specified in the first two digits of the following parentheses, respectively   
62. Print "string=%*.*s" % (7,2, String) # OUTPUT:STR ing= He

string= "Hello" #%s prints when the result is Hello print "string=%s"% string # Output:string=hello #%2s meaning string length is 2, when the length of the original string is more than 2 o'clock, press the original  Length printing, so%2s print results or hello print "string=%2s"% string # Output:string=hello #%7s meaning the string length is 7, when the length of the original string is less than 7 o'clock, the left side of the original string to fill the space,   #所以%7s print result is hello print "string=%7s"% string # output:string= Hello #%-7s meaning string length is 7, when the length of the original string is less than 7 o'clock, the right side of the original string to fill the space,    #所以%-7s print result is hello print "string=%-7s!"% string # Output:string=hello! #%.2s means to intercept the first 2 characters of a string, so%.2s prints the result of he print "string=%.2s"% string # Output:string=he #%.7s meaning to intercept the first 7 characters of a string when the original string is less than 7 o'clock , that is, the string itself, #所以%.7s print result is hello print "string=%.7s"% string # Output:string=hello #%a.bs This format is a synthesis of the above two formats, first based on the number of digits after the decimal point B    Truncate the string, #当截取的字符串长度小于a时, and also need to fill a space on its left print "string=%7.2s"% string # output:string= He print "string=%2.7s"% string # Output:string=hello print "string=%10.7s"% string # output:string= Hello #还可以用%*.*s to represent precision, two * values respectively in the first two of the following parentheses Bit value specifies print "string=%*.*s"% (7,2,string) # output:sTring= He   

%d integral type

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2. num= -     
6. #%d The result when printing   
8. Print "num=%d" % num # output:num=14
12. #%1d means that the printed result is a 1-bit integer, and when the number of digits in the integer exceeds 1 bits, the original value is printed, so the%1d is printed as   
14. Print "num=%1d" % num # output:num=14
18. #%3d means that the printed result is a 3-bit integer, and when the number of digits in the integer is not 3 bits, the left side of the integer is blank, so the print result of the%3d is   
20. Print "num=%3d" % num # output:num=
24. #%-3d means that the printed result is a 3-bit integer, and when the number of digits in the integer is not 3 bits, the right side of the integer is blank, so the%3d print is 14_   
26. Print "num=%-3d" % num # output:num=14_
30. #%05d means that the printed result is a 5-bit integer, and when the number of digits in the integer is not 5 bits, the left side of the integer is 0, so the%05d print is 00014   
32. Print "num=%05d" % num # output:num=00014
36. #%.3d 3 After the decimal point means that the printed result is a 3-bit integer,   
38. #当整数的位数不够3位时, the left side of the integer is 0, so the%.3d print result is 014   
40. Print "Num=%.3d" % num # output:num=014
44. #%.0003d 0003 and 3 after the decimal point represent 3, which means that the printed result is a 3-bit integer,   
46. #当整数的位数不够3位时, 0 is added to the left of the integer, so the%.3d print result is 014   
48. Print "num=%.0003d" % num # output:num=014
52. #%5.3d is a combination of two methods of completion, when the number of digits is not enough 3 o'clock, first on the left 0, or not enough 5 bits, and then on the left to fill the space,   
54. #规则就是补0优先, the final length of the selection of the larger one, so%5.3d printing results or 014   
56. Print "Num=%5.3d" % num # output:num= 014
60. #%05.3d is a combination of two methods of completion, when the number of digits is not enough 3 o'clock, first on the left 0, or not enough 5 bits,   
62. #由于是05, and then on the left side of 0, the final length of the selection of the larger one, so%05.3d printing results or 00014   
64. Print "Num=%05.3d" % num # output:num=00014
68. #还可以用%*.*d to represent precision, the values of two * are specified in the first two digits of the following parentheses, respectively   
70. #如下, but this way 04 lost the function of 0, can only fill the space, only 3 after the decimal point to fill 0   
72. print   "num=%*.*d"  %  ( 04 , 3 , num)    # OUTPUT: NUM= 014      

num=14 #%d Printing results in print "num=%d"% num # output:num=14 #%1d means that the printed result is a 1-bit integer, and when the number of digits in the integer exceeds 1 bits, the output of the%1d is printed by the integer original value, so or the print "num=%1d"% num # output:num=14 #%3d means that the printed result is a 3-bit integer, and when the number of digits in the integer is not 3 bits, the left side of the integer is blank, so the%3d printing result is "num          =%3d "% num # output:num= #%-3d means that the printed result is a 3-bit integer, when the number of digits is not enough 3 bits, the right side of the integer to fill the space, so%3d printing result is 14_ print" num=%-3d "% num # output:num=14_ #%05d means that the printed result is a 5-bit integer, when the number of digits is not 5 bits, the left side of the integer 0, so the%05d print result is 00014 print "num=%05d"% num # OU tput:num=00014 #%.3d 3 After the decimal point means that the print result is a 3-bit integer, #当整数的位数不够3位时, 0 on the left of the integer, so the%.3d print result is 014 print "Num=%.3d"% num # OUTP        ut:num=014 #%.0003d 0003 and 3 after the decimal point, both represent 3, meaning that the printed result is a 3-bit integer, #当整数的位数不够3位时, to the left of the integer 0, so the%.3d printing result is 014 print "num=%.0003d"% num # output:num=014 #%5.3d is a combination of two ways to fill, when the number of digits is not enough 3 o'clock, first in the left 0, or not enough 5 bits, and then on the left to fill the space, #规则就是补0优先, the final length of the larger selection of the value of that, so%5.3d printing results or 0 Print "Num=%5.3d"% num # output:num= 014 #%05.3d is a combination of two ways to fill, when the number of digits is not enough 3 o'clock, first in the left 0, or not enough 5 bits, #由于是05, and then on the left 0, the final The length of the selected value of the larger one, so%05.3d printing resultsor 00014 print "Num=%05.3d"% num # output:num=00014 #还可以用%*.*d to represent precision, two * values are specified #如下 in the first two digits of the following parentheses, but this way 04 loses the complement of 0   Can, can only fill the space, only 3 after the decimal point to fill 0 print "num=%*.*d"% (04,3,num) # output:num= 014

%f floating Point type

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2. Import Math
6. #%a.bf,a indicates the print length of the floating-point number, and B indicates the precision after the decimal point of the floating point   
10. #只是%f is the original value, the default is 5 digits after the decimal point   
12. Print "pi=%f" % Math.PI # output:pi=3.141593
16. #只是%9f, the print length of 9 digits, the decimal point also accounted for one bit, not enough left to fill the space   
18. Print "pi=%9f" % Math.PI # output:pi=_3.141593
22. #只有. When there is no subsequent number, the decimal output integer is removed, and 03 indicates insufficient 3 digits to the left of 0   
24. Print "pi=%03.f" % Math.PI # output:pi=003
28. #%6.3f indicates that the decimal point is accurate to 3 digits, with a total length of 6 digits, including a decimal point, not enough left fill space   
30. Print "pi=%6.3f" % Math.PI # output:pi=_3.142
34. #%-6.3f indicates that the decimal point is accurate to 3 digits, with a total length of 6 digits, including a decimal point, not enough right fill space   
36. Print "pi=%-6.3f" % Math.PI # output:pi=3.142_
40. #还可以用%*.*f to represent precision, the values of two * are specified in the first two digits of the following parentheses, respectively   
42. #如下, but this way 06 loses the function of 0, can only fill the space   
44. print   "pi=%*.*f"  %  ( 06 , 3 , Math.PI)     # OUTPUT: PI=_3.142      

The import math    #%a.bf,a represents the print length of the floating-point number, b indicates the precision after the decimal point of the float    #只是%f, and the default is 5 digits after the decimal point  print "pi=%f"% Math.PI             # output:pi=3.141593    #只是%9f, the print length of 9 digits, the decimal point also accounted for one bit, not enough left to fill  the blank print "pi=%9f"% Math.PI            # output:pi=_3.141593    #只有. When there is no subsequent number, it means that the decimal output integer is removed, 03 is not enough 3 digits left 0  print "pi=%03.f"% Math.PI          # output:pi=003    #% 6.3f means the decimal point is accurate to 3 bits, the total length 6 digits, including the decimal point, not enough left to fill the blank  print "pi=%6.3f"% Math.PI          # output:pi=_3.142    #%- 6.3f means the decimal point is accurate to 3 bits, the total length 6 digits, including the decimal point, not enough right fill blank  print "pi=%-6.3f"% Math.PI         # output:pi=3.142_    #还可以用%*.* F to express the accuracy, the values of two * are specified in the first two digits of the following parentheses  #如下, but this way 06 loses the function of 0, can only fill the space  print "pi=%*.*f"% (06,3,math.pi)   # output: pi=_3.142  

"Reprint" Python%s%d%f