Python入门的36个例子 之 36
# 040
import time
try:
f = file('040_Finally.py')
while True:
line = f.readline()
if len(line) == 0:
break
time.sleep(0.33)
print line,
# end of while
finally:
f.close()
print 'Closed the file.'
# end of try
output：
>>>
# 040
import time
try:
f = file('040_Finally.py')
while True:
line = f.readline()
if len(line) == 0:
break
time.sleep(0.33)
print line,
# end of while
finally:
f.close()
print 'Closed the file.'
# end of try
Closed the file.
>>>
源代码下载：下载地址在这里
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例1：
# _018
# This is a module (if write Chinese in a module, there will be a error)
def func1():
print 'This is function 1.'
def func2():
print 'This is function 2.'
def func3():
print 'This is function 3.'
# 019
# 使用“import”语句调用模块：
import _018_Module
_ ......
# 027
toolName = 'Google'
if toolName.startswith('Go'):
print 'The tool\'s name starts with \"Go\".'
if 'oo' in toolName:
print 'The tool\'s name contains the stirng "oo".'
print toolName.find('gl') # 返回首次出现“gl”字符串的索引
if toolName.find('Baidu ......
源代码下载：下载地址在这里
# 032
# 其实cPickle这个模块起到的作用可以用“完美地协调了文件中的内容（对象）和代码中的引用”来形容
import cPickle as p # 这条语句给cPickle起了个小名p
objectFileName = r'C:\Data.txt'
aList = [1, 2, 3]
f = file(objectFileName, 'w')
p.dump(aList, f)
f.close ......
源代码下载：下载地址在这里
# 035
class Person:
population = 0 #这个变量是属于整个类的
def __init__(self, name):
self.name = name
print '初始化 %s' % self.name
Person.population += 1
# end of def
def __del__(self):
print '%s says bye.' % self. ......
源代码下载：下载地址在这里
raise有两个参数，第一个是由我们自己定义的异常类型，第二个是关于此异常的少量说明信息。
# 038
def getAge():
age = input('Input your age:')
if (age < 0 or age > 160):
raise 'BadAgeError', 'It is impossible!!!!!'
# end of if
return age
# ......
