初识Python_技术问答

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初识Python

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樂成鳯

a = ([i*i for i in range(1,101)])
print sum(a)

2 7-2 Python之调用函数

2018-11-01

Linux独醉

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

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

0 8-3 对字符串切片

2018-10-31

Linux独醉

L = range(1, 101)
print L[90:]
print L[54::5]

0 8-2 倒序切片

2018-10-31

慕粉2202181173

L=['Adam','Lisa','Paul','Bart'];
L.pop(-1);
L.pop(0);
print;
这样执行也可以啊

0 4-5 Python从list删除元素

2018-10-31

慕UI8134040

print [x*101+y*10 for x in range(1,10) for y in range(0,10)]
二重不是更简单

1 10-4 多层表达式

2018-10-31

老衲明天要洗头

# -*- coding: utf-8 -*-

print r'''静夜思

床前明月光，

疑是地上霜。

举头望明月，

低头思故乡。'''

### 删掉 u 字符就行了，因为开头已经定义编码

6 3-7 Python中Unicode字符串

2018-10-31

老衲明天要洗头

print r'''"To be, or not to be": that is the question.
Whether it's nobler in the mind to suffer.'''

### 注意审题= =|||

1 3-6 Python中raw字符串与多行字符串

2018-10-31

老衲明天要洗头

#s='Python was started in 1989 by "Guido".Python is free and easy to learn.'
#print(s)

s="Python was started in 1989 by \"Guido\".Python is free and easy to learn."
print(s)

有两种表示方法

0 3-5 Python中定义字符串

2018-10-31

老衲明天要洗头

`
x1 = 1
d = 3
n = 100
x100= x1 + (n-x1)*d
s =( x100+x1)*n/2
print s
`

1 3-4 Python中什么是变量

2018-10-31

慕田峪5302999

def average(*args):
n=0
sum=0.0
if args==():
return 0.0
else:
for x in args:
sum+=x
n+=1
return sum/n
print average()
print average(1, 2)
print average(1, 2, 2, 3, 4)

1 7-7 Python之定义可变参数

2018-10-30

慕UI8134040

d = b*b - 4*a*c
if a == 0:
if b == 0:
if c == 0:
return 0
else:
return 'error'
return c/b
elif d >= 0:
e = math.sqrt(d)
x1 = (-b+e)/(2*a)
x2 = (-b-e)/(2*a)
return x1, x2

1 7-4 Python函数之返回多值

2018-10-30