初识Python_技术问答

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初识Python

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遗忘曾经

print [int(x+y+x) for x in '123456789' for y in '0123456789']

1 10-4 多层表达式

2015-09-17

遗忘曾经

def toUppers(L):
return [x.upper() if isinstance(x,str) else x for x in L]

print toUppers(['Hello', 'world', 101])

0 10-3 条件过滤

2015-09-17

akira1990

for i in range(1,101):
if not i % 7:
print i

0 9-1 什么是迭代

2015-09-17

akira1990

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

0 8-2 倒序切片

2015-09-17

akira1990

def average(*args):
return float(sum(args)) and float(sum(args)) / len(args)

print average()
print average(1, 2)
print average(1, 2, 2, 3, 4)

0 7-7 Python之定义可变参数

2015-09-17

慕仙1510791

还需要知道等差数列求和公式。。。

0 3-4 Python中什么是变量

2015-09-17

akira1990

d = {
'Adam': 95,
'Lisa': 85,
'Bart': 59
}
print 'adam:', d['Adam']
if 'Lisa' in d:
print 'lisa:',d['Lisa']
if d.get('Bart'):
print 'bart:',d['Bart']

0 6-2 Python之访问dict

2015-09-17

小狗快跑嘟嘟

print [x for x in range(100,1000) if (x % 100)%10 == x/100 ]

1 10-4 多层表达式

2015-09-17

akira1990

for x in range(1,10):
for y in range(0,10):
if x < y:
print str(x) + str(y)

0 5-8 Python之多重循环

2015-09-17

bobo爱追梦

d = {
'Adam': 95,
'Lisa': 85,
'Bart': 59
}
# for key,value in d.iteritems():
# print key,':',value
L=[]
for key in d:
L.append(key)
L[0],L[1]=L[1],L[0]
# print L
for x in L:
print x,':',d[x]

0 6-2 Python之访问dict

2015-09-17

bobo爱追梦

print [(x*100+y*10+z*1) for x in range(1,10) for y in range(0,10) for z in range(1,10) if x==z]

0 10-4 多层表达式

2015-09-17

bobo爱追梦

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

1 9-2 索引迭代

2015-09-16