d = {
'Adam': 95,
'Lisa': 85,
'Bart': 59
}
print d['Adam']
print d['Lisa']
print d['Bart']
'Adam': 95,
'Lisa': 85,
'Bart': 59
}
print d['Adam']
print d['Lisa']
print d['Bart']
2017-03-07
最赞回答 / LOIS3336345
<th>和<td>一样,也是需要嵌套在<tr>当中的,<tr>嵌套在<table>当中<th>...</th> 定义表头单元格。表格中的文字将以粗体显示。<TH>与<TD>同样是标示一个储存格,唯一不同的是<TH>所标示的储存格中的文字是以粗体出现
2017-03-07
sum = 0
x = 1
n = 1
while True:
sum +=2 **(n-1)
x=x+1
n=n+1
print sum
if n >20:
break
print sum
x = 1
n = 1
while True:
sum +=2 **(n-1)
x=x+1
n=n+1
print sum
if n >20:
break
print sum
2017-03-07
sum = 0
x = 1
while x <100 and x %2 !==0:
sum +=x
print sum
x = 1
while x <100 and x %2 !==0:
sum +=x
print sum
2017-03-07
def average(*args):
if not args:
return 0.0
return sum(args)/(len(args)+0.0)
if not args:
return 0.0
return sum(args)/(len(args)+0.0)
2017-03-07
def greet(x='world'):
print 'hello,%s.' % x
print 'hello,%s.' % x
2017-03-07