Python3.2 --- Print函数用法

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1. 输出字符串

>>> strHello = 'Hello World'

>>> print (strHello)

Hello World

2. 格式化输出整数

支持参数格式化，与C语言的printf类似

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

>>> print (strHello)the length of (Hello World) is 11

3. 格式化输出16进制，十进制，八进制整数

#%x --- hex 十六进制#%d --- dec 十进制#%o --- oct 八进制 <span class="kw1">>>> nHex = 0xFF>>> print("nHex = %x,nDec = %d,nOct = %o" %(nHex,nHex,nHex))nHex = ff,nDec = 255,nOct = 377</span>

4.格式化输出浮点数(float)

<span class="kw1">import</span> <span class="kw3">math>>> print('PI=%f'%math.pi)PI=3.141593>>> print ("PI = %10.3f" % math.pi)</span>

<span class="co1">PI =      3.142>>> print ("PI = %-10.3f" % math.pi)</span>

<span class="co1">PI = 3.142     >>> print ("PI = %06d" % int(math.pi))PI = 000003</span>

5. 格式化输出浮点数(float)

<span class="co1">>>> precise = 3>>> print ("%.3s " % ("python"))pyt</span>

<span class="co1">>>> precise = 4>>> print ("%.*s" % (4,"python"))pyth</span>

<span class="co1">>>> print ("%10.3s " % ("python"))       pyt</span>

6.输出列表(List)

输出列表

>>> lst = [1,2,3,4,'python']>>> print (lst)[1, 2, 3, 4, 'python']

输出字典

>>> d = {1:'A',2:'B',3:'C',4:'D'}
>>> print(d)
{1: 'A', 2: 'B', 3: 'C', 4: 'D'}

7. 自动换行

print 会自动在行末加上回车,如果不需回车，只需在print语句的结尾添加一个逗号”,“，就可以改变它的行为。

<span class="kw1">>>> for i in range(0,6):    print (i,)</span>

<span class="kw1">    012345</span>

或直接使用下面的函数进行输出：

<strong><span style="background-color: rgb(0, 176, 80);">>>> import sys>>> sys.stdout.write('Hello World')</span></strong>

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