Python string formatting output (format/printf) and pythonprintf

Python string formatting output (format/printf) and pythonprintf

For Python string formatting, use "character % format 1% Format 2 characters" % (variable 1, variable 2), and % format to accept the type of the variable. A simple example is as follows:

# Example: String formatting

Name = '17jo'
Print 'www. % s.com '% Name
> Www.17jo.com

Name = '17jo'
Zone = 'com'
Print 'www. % s. % s' % (Name, Zone)
> Www.17jo.com

When a string is formatted, the hundred semicolons are followed by different format symbols, representing different types of conversion. The specific symbols are shown below.

Format Symbol Representation type

% S string
% D/% I decimal integer
% U decimal integer
% O octal integer
% X/% X hexadecimal integer
% E/% E scientific count
% F/% F floating point number
% Output %

When the format symbol is a number, you can add a number and a fill space, for example, % [0] [total digits] [.] [number of decimal places] to set the style to be converted. The usage is as follows:

# Example: Digital formatting

NYear = 2018
NMonth = 8
NDay = 18
# Convert the format date % 02d to two integer types. Enter 0.
Print '% 04d-% 02d-% 02d' % (nYear, nMonth, nDay)
> # Output results

FValue = 8.123
Print '% 06.2f' % fValue # retain the 2-digit floating point type with a width of 6
> 008.12 # output

Print '% d' % 10 # output decimal
> 10
Print '% o' % 10 # output gossip
> 12
Print '% 02x' % 10 # output two hexadecimal letters, lowercase letters fill blank
> 0a
Print '% 04x' % 10 # output 4-digit hexadecimal format, uppercase letters fill blank
> 000A
Print '%. 2e' % 1.2888 # use scientific notation to output floating point type to retain 2 decimal places
> 1.29e + 00

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