Python Print函数用法

Python print函数用法，print 格式化输出

strHello = 'Hello Python' print strHello

#输出结果：Hello Python#直接出字符串

strHello = "the length of (%s) is %d" %('Hello World',[b]len('Hello World'))

print strHello

#输出果：the length of (Hello World) is 11

2.格式化输出16制整数

nHex = 0x20#%x --- hex 十六进制#%d --- dec 十进制#%d --- oct 八进制

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

3.格式化输出浮点数(float)

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)

#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

4.格式化输出字符串(string)

#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。

5.输出列表(list)

l = [1,2,3,4,'jcodeer']

print l#输出结果：[1, 2, 3, 4, 'jcodeer']#于list直接打印即可

d = {1:'A',2:'B',3:'C',4:'D'}

print d

#输出结果：{1: 'A', 2: 'B', 3: 'C', 4: 'D'}#同python也是支持dictionary出的

6.python print自动换行

for i in range(0,5):

print i,

sys.stdout.write("输出的字串")