Python的print格式化输出还支持‘字符串’精度控制

1.格式化输出整数
[python]strHello = "the length of (%s) is %d" %('Hello World',len('Hello World'))
print strHello
#输出果：the length of (Hello World) is 11
[/python]
2.格式化输出16制整数

#%x --- hex 十六进制
#%d --- dec 十进制
#%d --- oct 八进制

[python]
nHex = 0x20
print "nHex = %x,nDec = %d,nOct = %o" %(nHex,nHex,nHex)
#输出结果：nHex = 20,nDec = 32,nOct = 40
#使用整数的各个制打印同一个数
[/python]
3.格式化输出浮点数(float)
[python]
import math
#default
print "PI = %f" % math.pi
#width = 10,precise = 3,align = left
print "PI = %10.3f" % math.pi
#width = 10,precise = 3,align = rigth
print "PI = %-10.3f" % math.pi
#前面填充字符
print "PI = %06d" % int(math.pi)
#六位填0
#输出结果
#PI = 3.141593
#PI = 3.142
#PI = 3.142
#PI = 000003
#浮点数的格式化，精度、度和
[/python]
4.格式化输出字符串(string)
[python]
#precise = 3
print "%.3s " % ("jcodeer")
#precise = 4
print "%.*s" % (4,"jcodeer")
#width = 10,precise = 3
print "%10.3s" % ("jcodeer")
#输出结果：
#jco
#jcod
# jco
#同于字符串也存在精度、度和[/python]

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From:Python的print格式化输出还支持‘字符串’精度控制

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