初识Python_技术问答

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初识Python

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xiangm2

d = { 'Adam': 95, 'Lisa': 85, 'Bart': 59 }
def generate_tr(name, score):
if score >= 60:
return '<tr><td>%s</td><td>%s</td></tr>' % (name, score)
else:
return '<tr><td>%s</td><<td style="color:red">%s</td></tr>' % (name, score)

0 10-2 复杂表达式

2015-10-03

xiangm2

'''
#试试函数
def averDict(d = {}):
sum = 0
for i,v in d.iteritems():
print i,v
sum += v
print 'average', ':', float(sum)/len(d)

'''

0 9-4 迭代dict的key和value

2015-10-03

xiangm2

d = { 'Adam': 95, 'Lisa': 85, 'Bart': 59, 'Paul': 74 }
sum = 0
for v in d.itervalues():
sum += v
print sum/(len(d))

0 9-3 迭代dict的value

2015-10-03

xiangm2

L = ['Adam', 'Lisa', 'Bart', 'Paul']
i = range(1,5)
_list = zip(i,L)
for index, name in _list:
print index, '-', name

0 9-2 索引迭代

2015-10-03

xiangm2

for i in range(1,101):
if i%7 ==0:
print i

0 9-1 什么是迭代

2015-10-03

xiangm2

def firstCharUpper(s):
return s[0].upper()+s[1:]

print firstCharUpper('hello')
print firstCharUpper('sunday')
print firstCharUpper('september')

0 8-3 对字符串切片

2015-10-03

xiangm2

L = range(1, 101)
print L[-10:]
print L[4::5][-10:]

太机智赞一个

1 8-2 倒序切片

2015-10-03

xiangm2

def greet(world = 'world'):
print 'Hello' + ' '+ world
greet()
greet('Bart')

0 7-6 Python之定义默认参数

2015-10-03

xiangm2

def quadratic_equation(a, b, c):
temp = b**2 - 4*a*c
if temp < 0:
print '德尔塔小于零'
else:
x = (-b - math.sqrt(b**2 -4*a*c ))/(2*a)
y = (-b + math.sqrt(b**2 -4*a*c ))/(2*a)
return y,x

print quadratic_equation(2, 3, 0)
print quadratic_equation(1, -6, 5)

1 7-4 Python函数之返回多值

2015-10-03

xiangm2

def square_of_sum(L):
sum = 0
for i in L:
sum += i*i
return sum

print square_of_sum([1, 2, 3, 4, 5])
print square_of_sum([-5, 0, 5, 15, 25])

0 7-3 Python之编写函数

2015-10-03

xiangm2

L = []
for i in range(1,101):
ii = i*i
L.append(ii)
print sum(L)

2 7-2 Python之调用函数

2015-10-03

xiangm2

s = set(['Adam', 'Lisa', 'Bart', 'Paul'])
ss = set()
for i in s:
i = i.lower()
ss.add(i)
print 'adam' in ss
print 'bart' in ss

0 6-7 Python之访问set

2015-10-03

xiangm2

for x in range(1,10):
for y in range(0,10):
if x<y:
print '%s%s'%(x,y)

0 5-8 Python之多重循环

2015-10-03

ChiCheng

老师讲课好厉害！！赞！

0 1-1 Python入门课程介绍

2015-10-03

xiangm2

sum = 0
x = 1
while True:
x = x + 1
if x %2 == 0:
continue
else:
print x
sum += x
if x >= 99:
sum += 1
break
print sum

0 5-7 Python之 continue继续循环

2015-10-03

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