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<p>我只发布问题所在的部分,程序没有错误(除了这个<code>raw_input</code>问题之外,所有代码都是有效的)</p>
<p>我用<code>search_function(1)</code>等进行了测试,结果奏效了。在</p>
<p>但是如果我做这个while循环,它不会打印任何东西。
输出示例:</p>
<blockquote>
<p>Enter a number to print specific table,
or STOP to quit: 2 Enter a number to
print specific table, or STOP to quit:
2 Enter a number to print specific
table, or STOP to quit: 1 Enter a
number to print specific table, or STOP
to quit: Enter a number to print
specific table, or STOP to quit: 1
Enter a number to print specific table,
or STOP to quit: Enter a number to
print specific table, or STOP to quit:
STOP</p>
</blockquote>
<pre><code>def search_function(x):
if x == 1:
for student in students:
print "%-17s|%-10s|%-6s|%3s" % student.print_information()
print '\n'
if x == 2:
print "%-17s|%-10s|%s" %(header[0],header[1],header[4])
print "-" * 45
for student in students:
print "%-17s|%-10s|%s" %student.print_first()
print '\n'
print "Simple Analysis on favorite sports: "
# Printing all sports that are specified by students
for s in set(Student.sports): # class attribute
print s, Student.sports.count(s), round(((float(Student.sports.count(s)) / num_students) *100),1)
# Printing sports that are not picked
allsports = ['Basketball','Football','Other','Baseball','Handball','Soccer','Volleyball','I do not like sport']
for s in set(allsports) - set(Student.sports):
print s, 0, '0%'
choice_list = Student.sports
for choice in choice_list:
choice_dict[choice] = choice_dict.get(choice, 0) + 1
print max(choice_dict)
print min(choice_dict)
elif x == 3:
print "%-17|%-10s|%-16s|%s" %(header[0],header[1],header[5],header[6])
print "-" * 45
for student in students:
print "%-17s|%-10s|%-16s|%s" % student.print_second()
print '\n'
elif x == 4:
print "%-17s|%-10s|%s" %(header[0],header[1],header[7])
print "-" * 45
for student in students:
print "%-17s|%-10s|%s" %student.print_third()
print '\n'
elif x == 5:
print "%-17s|%-10s|%-15s|%s" %(header[0],header[1],header[8],header[9])
print "-" * 45
for student in students:
print "%-17s|%-10s|%-16s|%s" % student.print_fourth()
print '\n'
x = raw_input("Enter a number to print specific table, or STOP to quit: ")
while x != 'STOP':
search_function(x)
x = raw_input("Enter a number to print specific table, or STOP to quit: ")
</code></pre>