1、判斷是否是數字

math.isnan("a")  

2、數學math

math.log(x)

3、檢視安裝路徑

import sys
print sys.path

4、字串與日期的轉換

def formatdate(date,beforeformat,afterformat):
    timeArray=time.strptime(str(date),beforeformat)
    timeStamp=int(time.mktime(timeArray))
    timeLocal=time.localtime(timeStamp)
    ds=time.strptime(aftertime,aftertime)
    return ds
 

5、range()生成數字陣列

>>> range(10)
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> range(1,10)
[1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> range(1,10,1)
[1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> range(1,10,3)
[1, 4, 7]
>>> range(0,-10,-1)
[0, -1, -2, -3, -4, -5, -6, -7, -8, -9]
>>> range(0)
[]
>>> range(1,0)
[]
>>> r=range(5)
>>> type(r)
<type 'list'>
>>> 
 

6、除法保留小數

round(float(a)/float(b),2)  

7、輸出%

print '%.2f%%' % (2.322)