几个简单的python脚本编写

# vim fibs.py
#!/usr/bin/python
fibs = [0, 1]
for i in range(8):
fibs.append(fibs[-1] + fibs[-2])
print fibs
# ./fibs.py
[0, 1, 1, 2, 3, 5, 8, 13, 21, 34]

# vim fibs2.py
#!/usr/bin/python
fibs = [0, 1]
nums = int(raw_input('Input a number: '))
for i in range(nums - 2):
　fibs.append(fibs[-1] + fibs[-2])
print fibs
# ./fibs2.py
Input a number: 5
[0, 1, 1, 2, 3]

# vim cp.py
#!/usr/bin/python
dstfile = '/root/ls'
srcfile = '/bin/ls'
oldf = open(srcfile)             #以读方式打开老文件
newf = open(dstfile, 'w')       #以写方式打开新文件
while True:                       #因为不确定要循环多少次，设置条件永远为真
　data = oldf.read(4096)       #每次只读入4096字节
　if len(data) == 0:           #如果文件已经全部读取完毕则中断循环
　　break
　newf.write(data)
oldf.close()
newf.close()

# vim randpass.py
#!/usr/bin/python
import string
import random
passwd = ''
passchs = string.letters + string.digits
for i in range(8):
　　　passwd += random.choice(passchs)
print passwd
# ./randpass.py
1U4MMBg3

# vim randpass2.py
#!/usr/bin/python
import string
import random
allchs = string.letters + string.digits
def genPwd(num = 8):
　pwd = ''
　for i in range(num):
　　pwd += random.choice(allchs)
　return pwd
if __name__ == '__main__':
　print genPwd()
　print genPwd(6)
# ./randpass2.py
hUEDcvmc
RgNMhu