苍穹外卖

1

Define a function that can accept an integer number as input and print the “It is an even number” if the number is even, otherwise print “It is an odd number”.

def checkValue(n):
    if n%2 == 0:
        print ("It is an even number")
    else:
        print ("It is an odd number")
checkValue(7)

2

Define a function that can accept two strings as input and print the string with maximum length in console. If two strings have the same length, then the function should print al l strings line by line.

def f(s1,s2):
    if len(s1)>len(s2):
        print(s1)
    elif len(s1)<len(s2):
        print(s2)
    else:
        print(s1)
        print(s2)
f("1","23")
print()
f("12","3")
print()
f("1","2")

3

Define a function that can accept two strings as input and concatenate them and then print it in console.

def f(s1,s2):
    s=s1+s2
    return s
s1 = input("s1:")
s2 = input("s2:")
print(f(s1,s2))

4

Define a function that can receive two integral numbers in string form and compute their sum and then print it in console.

分析：字符串转int，然后计算

def f(n1,n2):
    n = int(n1)+int(n2)
    return n
s1 = input("s1:")
s2 = input("s2:")
print(f(s1,s2))

5

Define a function that can convert a integer into a string and print it in console.

int型转字符串

def f(n):
    print(str(n))
f(15)

6

Define a function that can convert a integer into a string and print it in console.

def f(n):
    print(str(n))
f(6)

7

Define a function which can compute the sum of two numbers.

def f(n1,n2):
    return n1+n2
print(f(12,345))

8

Define a class, which have a class parameter and have a same instance parameter

class Myclass:
    def __init__(self):
        pass
a = Myclass()

9

Python has many built-in functions, and if you do not know how to use it, you can read document online or find some books. But Python has a built-in document function for every built-in functions. Please write a program to print some Python built-in functions documents, such as abs(), int(), raw_input() And add document for your own function

分析：使用__doc__()方法可以输出函数内的注释

10

Write a method which can calculate square value of number

def f(n):
    return n**2
print(f(10))

11

Write a program to compute the frequency of the words from the input. The output should output after sorting the key alphanumerically.

分析：字符串处理

s = input("Please input a sentence:")
words =s.split()
counts ={}
for word in words:
    counts[word]=counts.get(word,0)+1
items = list(counts.items())
items.sort()
for item in items:
    word,count =item
    print("{}:{}".format(word,count))

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