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# 039
while True:
try:
x = int(raw_input('Input a number:'))
y = int(raw_input('Input a number:'))
z = x / y
except ValueError, ev:
print 'That is not a valid number.', ev
except ZeroDivisionError, ez:
print 'Divisor is zero:', ez
except:
print 'Unexpected error.'
raise
else:
print 'There is no error.'
break
# end of try
# end of while
print x,'/',y,'=',x/y
output£º
Input a number:w
That is not a valid number. invalid literal for int() with base 10: 'w'
Input a number:9
Input a number:0
Divisor is zero: integer division or modulo by zero
Input a number:9
Input a number:3
There is no error.
9 / 3 = 3
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# 004
# ÀûÓÃÈýÒýºÅ(''' or """)¿ÉÒÔָʾ¶àÐÐ×Ö·û´®
print '''line1
line2
line3'''
# ÁíÍ⣬Ä㻹¿ÉÒÔÔÚÈýÒýºÅÖÐÈÎÒâʹÓõ¥ÒýºÅºÍË«ÒýºÅ
print ''' "What's up? ," he replied.'''
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print ' \"Wha ......
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# 023
# Tuple(ÔªËØ×é)ÊDz»¿É±äµÄÁбí
tuple1 = (1, 2, 3)
print tuple1
tuple2 = (tuple1, 4, 5, 6) # Ò»¸öÔªËØ×é¿ÉÒÔ×÷ΪÁíÍâÒ»¸öÔªËØ×éµÄÔªËØ
print tuple2 # ²¢ÇÒÄܹ»ÔÚ´æ´¢µÄʱºò±£³ÖÔʼµÄÂß¼¹ØÏµ
for ele in tuple2:
print ele
print '\n'
for ele in tuple2[0]:
pr ......
# 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') # ·µ»ØÊ״γöÏÖ“gl”×Ö·û´®µÄË÷Òý
if toolName.find('Baidu ......
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A Byte Of Python
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Suppose you want to write a program which has to keep track of the
teachers and students in a college. They have some common
characteristics such as name, age and address. They also have specific
characteristics such as sala ......