Python string formatting

Source: Internet
Author: User
Tags vars

Modifier between% and the conversion character

    • -, left alignment flag, default to right alignment
    • +, display numeric symbol
    • 0, 0 padding
    • A number that specifies the minimum width
    • . A decimal point, followed by the number of digits (the maximum number of strings, the number of digits after the float, the smallest number of integers )
    • * For replacing field widths
1 Print('%*.*f'% (10, 2, 3.14159))2 Print('%.4s,%.5d,%.3f'% ('Hello', 16, 3.14159))3 Print('% (key) 010d,% (name) 10s'% {'Key': 123,'name':'Ron'})4 5 #VARs () function Tips6Name ='Ron'7Age = 258 Print('% (name) s is% (age) +d years old'% VARs ())

Advanced string Formatting S.format

    • {n} n is an integer: replaced by positional parameter
    • {name}: Replaced by keyword parameter
    • {{}}: output {}
    • {Name[n]}: Sequence Lookup
    • {Name[key]}: Dictionary Lookup
    • {name.attr}: Property Lookup
    • {PLACE:FORMAT_SPEC}: Specify format
      • [Fill[align][sign][0][width][.precision][type]]
      • <,^,>: Align Left and right

1 Print("{0},{1},{0}". Format ('Hello',' World'))2 Print("{Name}, {age}". Format (age=25, name='Ron'))3 Print('{0}, {age}'. Format ('Hello', age=22))4 Print('{{Hello}}, {}'. Format (123))5 Print('{name[1]}'. Format (name=[1,2,3]))6 Print('{Name[key]}'. Format (name={'Key':'Hello'}))7 Print('{0.__doc__}'. Format (str))8 Print("{0.real} {0.imag}". Format (3 + 4j))9 Print("{name:>8},{age:*^8d}, {high:8.2f}". Format (name='Ron', Age=25, high=176.567))Ten  Onex = 42; y = 3.14159 A Print('{0:010b}'. Format (x)) - Print('{0:010x}'. Format (x)) - Print('{0:+010.2f}'. Format (y)) the Print('{0:<+10.2%}'. Format (y)) - Print('{0:{width}.{ PRE}F}'. Format (y, width=10, pre=3)) - Print('{0!r:^20}'. Format ('Guido'))

Python string formatting

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