MAC Learning Series Python Challenge 1-10

1. Give you both Var A and B, print the value of a+b, just do it!!
   Answer:
print a+b

2. Give you a list L, such as l=[2,8,3,50], sort L in ascending order and output,
   The result of example L is [2,3,8,50]
   Answer:
L=[2,8,3,50]
L.sort() or L.sorted()
print L

3. Give you a string a, such as a= ' 12345 ', to reverse the output a.

Answer:a = ‘12345’b = a[::-1]print b

1. Give you a dictionary a, such as A={1:1,2:2,3:3}, output the key of dictionary A to ', ' link, such as ' a '.

Answer:print(‘,‘.join(map(str, a.keys())))

Map Function Example

    >>> def add100(x):...     return x+100... >>> List = [11,22,33]>>> map(add100, List)[111122133]

1. Give you a string a, the output word Fu Chi number position of the string. such as A= ' 12345 ', then output 135.

Answer：print a[::2]

1. All prime numbers within the output 100, separated by a space between primes

answer:primes  =[]  for  i  in range ( 2 , 100 ): flag = False For  j  in range (2 , int (i /2 ) +1 ): if  i  % j = = 0:  flag =trueif  not Flag:primes.  Append (i ) print (. Join (Map (str, primes ))  

1. Known rectangle length A, width b, output its area and perimeter, area and perimeter separated by a space

str(a*b)+‘ ‘+str(2*(a+b))

1. Give you a list L, such as l=[0,1,2,3,4], the median of the output l (if the result is a decimal, one decimal place is reserved).

Answer:L = sorted(L)iflen(L)%2 == 1:    x =  L[(len(L)-1)/2]else:    x = L[len(L)/2-1]/2.0+L[len(L)/2]/2.0print  x

1. Give you two positive integers a and B, and output their greatest common divisor.

Answer:printmaxforin range(1if (a%i+b%i)==0])

1. Give you two positive integers a and B, and output their least common multiple.

a*b/maxforin range(1,aif (a%i+b%i)==0])

Not finished, to be continued

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MAC Learning Series Python Challenge 1-10