Today, I practiced a bit of writing a function in Python, and you put it on a blog. Bubble sort and prime judgment

The first one is to judge the prime number, first on the Code bar:

1  fromMathImportsqrt2 defIs_prime (i):3     ifi = = 2:4         returnTrue5     elifI<2:6         returnFalse7     elifi%2 = =0:8         returnFalse9     Else:Ten          forNinchRange (3,int (sqrt (i) +1), 2): One             ifi%n = =0: A                 returnFalse -     returnTrue

Here is the math package sqrt, in order to maximize efficiency, less loops, there is a range function, there are three parameters, respectively, the starting point, end point, interval, interval is optional, like range (0,12,3 is [0,3,6,9].

The second one is the bubble sort, or the code:

Import randomlist = range (0,10) for I in list:    print (i) random.shuffle (list) for I in list:    print (i) for D in range ( Len (list) -1,0,-1): For    e in range (0,d,1):        if list[e] > list[e+1]:            list[e],list[e+1] = list[e+1],list[ E]for i in list:    print (i)

This is very interesting, contains a random package, because I want to put an ordered array of scrambled, with this random.shuffle function, bubble sort nothing to say, the only thing to note is this sentence

LIST[E],LIST[E+1] = List[e+1],list[e], is not very cool, do not use a third-party variable, but it seems that the compile time will produce a third-party variable. Here again to leave a problem for themselves to achieve random.shuffle ().
The code for the problem yesterday:

def volid (pwd):     a = any (map (str.isupper,pwd))     B = No (map (str.islower,pwd))     C = Any (map (str.isdigit,pwd))     d = Not all (map (str.isalnum,pwd))     if sum ([A,b,c,d]) >1:        return True     else:         return False

　　

Today, I practiced a bit of writing a function in Python, and you put it on a blog. Bubble sort and prime judgment