Python学习之字符串

# coding=utf-8

# %s为占位说明符

print '字符串格式化:'

format = 'Hello, %s, %s emouth for you'

values = ('world', 'Hot')

print format % values

from math import pi

format = 'Pi with three decimals:%.3f'

print format % pi

print '%s plus %s equals %s' % (1, 1, 2)

print 'Price of eggs: $%d' % 42

print 'Hexadecimal price of eggs: %x' % 42

from math import pi

print 'Pi: %f...' % pi

print 'Very inexact estimate of pi: %i' % pi

print 'Using str:%s' % 42L

print 'Using repr :%r' % 42L

print '宽度和精度'

print '%10f' % pi

# 宽度为10，精度为2

print '%10.2f' % pi

print '%.2f' % pi

print '%.5s' % 'Guido van Rossum'

print '%.*s' % (5, 'Guido van Rossum')

print '符号，对齐,0填充'

# 用0填充

print '%010.2f' % pi

#减号(-)左对齐

print '%-10.2f' % pi

print '%5d' % 10

print '%5d' % -10

#不管正数还是负数都标出符号

print '%+5d' % 10

print '%+5d' % -10

print '字符串常量'

import string

print string.digits

print string.letters

print string.lowercase

print string.printable

print string.punctuation

print string.uppercase

print '字符串方法'

title = "Monty Python's Flying Circus"

print title.find('Monty')

print title.find('Monty', 1)

print title.find('Python', 1, 26)

#join必须是字符串

dirs = '', 'usr', 'bin', 'env'

print '/'.join(dirs)

print 'asdaTTDdddssdT'.lower()

print 'This is a test'.replace('is', 'XX')

print '1+2+3+4+5'.split('+')

print ' begin end '.strip()

print '转换表'

from string import maketrans

table = maketrans('cs', 'kz')

print table

#字母c和s分别替换成kz

print 'this is an incredible test'.translate(table)

输出

"D:\Program Files\Python\python.exe" G:/HelloPython/list/char.py

字符串格式化:

Hello, world, Hot emouth for you

Pi with three decimals:3.142

1 plus 1 equals 2

Price of eggs: $42

Hexadecimal price of eggs: 2a

Pi: 3.141593...

Very inexact estimate of pi: 3

Using str:42

Using repr :42L

宽度和精度

3.141593

3.14

3.14

Guido

Guido

符号，对齐,0填充

0000003.14

3.14

10

-10

+10

-10

字符串常量

0123456789

abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ

abcdefghijklmnopqrstuvwxyz

0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~

!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~

ABCDEFGHIJKLMNOPQRSTUVWXYZ

字符串方法

0

-1

6

/usr/bin/env

asdattddddssdt

ThXX XX a test

['1', '2', '3', '4', '5']

begin end

转换表