Checkio代码闯关小计

阅读量：6590 次

发布时间：2019-06-24

本文共 12915 字，大约阅读时间需要 43 分钟。

首字母大写并增加标点关卡（Correct Sentence）：

def correct_sentence(text: str) -> str:

"""

returns a corrected sentence which starts with a capital letter

and ends with a dot.

"""

your code here

text=text[0].upper()+text[1:]if text[-1]!='.':    text=text+"."return textreturn text

if name == 'main':

print("Example:")

print(correct_sentence("greetings, friends"))

# These "asserts" are used for self-checking and not for an auto-testingassert correct_sentence("greetings, friends") == "Greetings, friends."assert correct_sentence("Greetings, friends") == "Greetings, friends."assert correct_sentence("Greetings, friends.") == "Greetings, friends."assert correct_sentence("hi") == "Hi."print("Coding complete? Click 'Check' to earn cool rewards!")

截取第一个单词（First Word）

import re

def first_word(text: str) -> str:

"""

returns the first word in a given text.

"""

your code here

a = re.compile(r".*?([a-zA-Z']+)")return a.match(text).group(1)

if name == 'main':

print("Example:")

print(first_word("Hello world"))

# These "asserts" are used for self-checking and not for an auto-testingassert first_word("Hello world") == "Hello"assert first_word(" a word ") == "a"assert first_word("don't touch it") == "don't"assert first_word("greetings, friends") == "greetings"assert first_word("... and so on ...") == "and"assert first_word("hi") == "hi"print("Coding complete? Click 'Check' to earn cool rewards!")

第二个相同字符引索（Second Index）

def second_index(text: str, symbol: str):

"""

returns the second index of a symbol in a given text

"""

your code here

a=text.find(symbol, text.find(symbol) + 1)#find函数的嵌套使用查询第二个字符if a==-1:    a=Nonereturn a

if name == 'main':

print('Example:')

print(second_index("sims", "s"))

# These "asserts" are used for self-checking and not for an auto-testingassert second_index("sims", "s") == 3, "First"assert second_index("find the river", "e") == 12, "Second"assert second_index("hi", " ") is None, "Third"assert second_index("hi mayor", " ") is None, "Fourth"assert second_index("hi mr Mayor", " ") == 5, "Fifth"print('You are awesome! All tests are done! Go Check it!')

最大值的键输出（Best Stock）

def best_stock(data):

your code here

new_dict = {v: k for k, v in data.items()}#将键与值反转存入新的字典return new_dict[ max(data.values())]#输出最大data的值并作为新的字典的键输出值

if name == 'main':

print("Example:")

print(best_stock({

'CAC': 10.0,

'ATX': 390.2,

'WIG': 1.2

}))

# These "asserts" are used for self-checking and not for an auto-testingassert best_stock({    'CAC': 10.0,    'ATX': 390.2,    'WIG': 1.2}) == 'ATX', "First"assert best_stock({    'CAC': 91.1,    'ATX': 1.01,    'TASI': 120.9}) == 'TASI', "Second"print("Coding complete? Click 'Check' to earn cool rewards!")

字符出现频率（Popular Words）

import re

def popular_words(text, words):

your code here

dic1={}for k in range(len(words)):    i = 0    a= re.finditer(words[k],text.lower())#返回全部相匹配字符串    for match in a:        i=i+1    dic1[words[k]] = i#存入字典以及i（字符频率）    k +=1return dic1

if name == 'main':

print("Example:")

print(popular_words('''

When I was One,

I had just begun.

When I was Two,

I was nearly new.

''', ['i', 'was', 'three']))

# These "asserts" are used for self-checking and not for an auto-testingassert popular_words('''

When I was One,

I had just begun.

When I was Two,

I was nearly new.

''', ['i', 'was', 'three']) == {

'i': 4,

'was': 3,

'three': 0

}

print("Coding complete? Click 'Check' to earn cool rewards!")

最贵商品排名（Bigger Price）

def bigger_price(limit, data):

"""

TOP most expensive goods

"""

your code here

list=[]def dic_key(data):        return data['price']#字典输出值while (limit>0):    limit-=1#排名的递归    list.append(max(data, key=dic_key))#最大值的字典存入列表    data.remove(max(data, key=dic_key))#移除最大值的字典return list

if name == 'main':

from pprint import pprint

print('Example:')

pprint(bigger_price(2, [

{"name": "bread", "price": 100},

{"name": "wine", "price": 138},

{"name": "meat", "price": 15},

{"name": "water", "price": 1}

]))

# These "asserts" using for self-checking and not for auto-testingassert bigger_price(2, [    {"name": "bread", "price": 100},    {"name": "wine", "price": 138},    {"name": "meat", "price": 15},    {"name": "water", "price": 1}]) == [    {"name": "wine", "price": 138},    {"name": "bread", "price": 100}], "First"assert bigger_price(1, [    {"name": "pen", "price": 5},    {"name": "whiteboard", "price": 170}]) == [{"name": "whiteboard", "price": 170}], "Second"print('Done! Looks like it is fine. Go and check it')

能整除后输出（Fizz buzz）

#Your optional code here

#You can import some modules or create additional functions

def checkio(number):

#Your code here

#It's main function. Don't remove this function

#It's using for auto-testing and must return a result for check.

#replace this for solutiona = ''if number % 3 == 0:    a += 'Fizz'if number % 5 == 0:    a += ' Buzz'if number % 3 != 0 and  number % 5 != 0:    a=str(number)return a.strip(' ')

#Some hints:

#Convert a number in the string with str(n)

#These "asserts" using only for self-checking and not necessary for auto-testing

if name == 'main':

assert checkio(15) == "Fizz Buzz", "15 is divisible by 3 and 5"

assert checkio(6) == "Fizz", "6 is divisible by 3"

assert checkio(5) == "Buzz", "5 is divisible by 5"

assert checkio(7) == "7", "7 is not divisible by 3 or 5"

print("Coding complete? Click 'Check' to review your tests and earn cool rewards!")

最大值减最小值（The Most Numbers）

def checkio(*args):

if not args: return 0

argslist = sorted( args )#排序存入列表return argslist[-1] - argslist[0]#相减

#These "asserts" using only for self-checking and not necessary for auto-testing

if name == 'main':

def almost_equal(checked, correct, significant_digits):

precision = 0.1 ** significant_digits

return correct - precision < checked < correct + precision

assert almost_equal(checkio(1, 2, 3), 2, 3), "3-1=2"assert almost_equal(checkio(5, -5), 10, 3), "5-(-5)=10"assert almost_equal(checkio(10.2, -2.2, 0, 1.1, 0.5), 12.4, 3), "10.2-(-2.2)=12.4"assert almost_equal(checkio(), 0, 3), "Empty"print("Coding complete? Click 'Check' to review your tests and earn cool rewards!")

第0，2，4相加乘最后一位（Even the last）

def checkio(array):

"""

sums even-indexes elements and multiply at the last

"""

if array:

return sum(array[::2])*array[-1]

else:return 0

#These "asserts" using only for self-checking and not necessary for auto-testing

if name == 'main':

assert checkio([0, 1, 2, 3, 4, 5]) == 30, "(0+2+4)5=30"
assert checkio([1, 3, 5]) == 30, "(1+5)5=30"

assert checkio([6]) == 36, "(6)*6=36"

assert checkio([]) == 0, "An empty array = 0"

print("Coding complete? Click 'Check' to review your tests and earn cool rewards!")

大写字母获取（ Secret Message Secret Message ）

import re

def find_message(text):

"""Find a secret message"""

b=''

result=re.compile(r'[A-Z]+')

for a in result.findall(text):

b+=a

return b

if name == 'main':

#These "asserts" using only for self-checking and not necessary for auto-testing

assert find_message("How are you? Eh, ok. Low or Lower? Ohhh.") == "HELLO", "hello"

assert find_message("hello world!") == "", "Nothing"

assert find_message("HELLO WORLD!!!") == "HELLOWORLD", "Capitals"

print("Coding complete? Click 'Check' to review your tests and earn cool rewards!")

连续三个单词（Three Words）

def checkio(words):

b=0

a=words.split(' ')

for i in range(len(a)):#分隔

if a[i].isalpha():#判断字母

if b>=2:

return True            b+=1    else:b=0return False

#These "asserts" using only for self-checking and not necessary for auto-testing

if name == 'main':

assert checkio("Hello World hello") == True, "Hello"

assert checkio("He is 123 man") == False, "123 man"

assert checkio("1 2 3 4") == False, "Digits"

assert checkio("bla bla bla bla") == True, "Bla Bla"

assert checkio("Hi") == False, "Hi"

print("Coding complete? Click 'Check' to review your tests and earn cool rewards!")

N位置的N次方（index_power）

def index_power(array, n):

"""

Find Nth power of the element with index N.

"""

if n>=len(array):

return -1

else: return array[n]**n

if name == 'main':

#These "asserts" using only for self-checking and not necessary for auto-testing

assert index_power([1, 2, 3, 4], 2) == 9, "Square"

assert index_power([1, 3, 10, 100], 3) == 1000000, "Cube"

assert index_power([0, 1], 0) == 1, "Zero power"

assert index_power([1, 2], 3) == -1, "IndexError"

print("Coding complete? Click 'Check' to review your tests and earn cool rewards!")

右替换为左（left_join）

def left_join(phrases):

"""

Join strings and replace "right" to "left"

"""

b=''

for a in phrases :

b+=a+','#放在一个字符串中

return b.replace('right','left')[:-1]#替换

if name == 'main':

#These "asserts" using only for self-checking and not necessary for auto-testing

assert left_join(("left", "right", "left", "stop")) == "left,left,left,stop", "All to left"

assert left_join(("bright aright", "ok")) == "bleft aleft,ok", "Bright Left"

assert left_join(("brightness wright",)) == "bleftness wleft", "One phrase"

assert left_join(("enough", "jokes")) == "enough,jokes", "Nothing to replace"

print("Coding complete? Click 'Check' to review your tests and earn cool rewards!")

字符乘积（Digits Multiplication）

def checkio(number):

a = 1

for b in range(len(str(number))):

if str(number)[b]=='0':

a=a1
else:a=aint(str(number)[b])

return a

#These "asserts" using only for self-checking and not necessary for auto-testing

if name == 'main':

assert checkio(123405) == 120

assert checkio(999) == 729

assert checkio(1000) == 1

assert checkio(1111) == 1

print("Coding complete? Click 'Check' to review your tests and earn cool rewards!")

进制转换（Number Base）

def checkio(str_number, radix):

dict={}sum=0for i in range(0,10):#将数字和字母存入字典    dict[str(i)]=ia=len(str_number)-1for i in range(65,91):    dict[chr(i)]=i-55for i in str_number:#进制超出输出-1否则计算进制    if dict[i]>=radix:        return -1    else:            sum+=dict[i]*radix**a    a-=1return sum

#These "asserts" using only for self-checking and not necessary for auto-testing

if name == 'main':

assert checkio("AF", 16) == 175, "Hex"

assert checkio("101", 2) == 5, "Bin"

assert checkio("101", 5) == 26, "5 base"

assert checkio("Z", 36) == 35, "Z base"

assert checkio("AB", 10) == -1, "B > A = 10"

print("Coding complete? Click 'Check' to review your tests and earn cool rewards!")

绝对值排序（Absolute sorting）

def checkio(numbers_array):

dict={}

list=[]

for a in numbers_array:

dict[abs(a)]=a

list.append(abs(a))

list.sort()

for a in range(len(list)):

list[a]=dict[list[a]]

return list

#These "asserts" using only for self-checking and not necessary for auto-testing

if name == 'main':

def check_it(array):

if not isinstance(array, (list, tuple)):

raise TypeError("The result should be a list or tuple.")

return list(array)

assert check_it(checkio((-20, -5, 10, 15))) == [-5, 10, 15, -20], "Example"  # or (-5, 10, 15, -20)assert check_it(checkio((1, 2, 3, 0))) == [0, 1, 2, 3], "Positive numbers"assert check_it(checkio((-1, -2, -3, 0))) == [0, -1, -2, -3], "Negative numbers"print("Coding complete? Click 'Check' to review your tests and earn cool rewards!")

高频率字符（The Most Frequent）

def most_frequent(data):

"""

determines the most frequently occurring string in the sequence.

"""

your code here

b=''c=0for a in data:   if data.count(a)>c:        b=a   else:continuereturn b

if name == 'main':

#These "asserts" using only for self-checking and not necessary for auto-testing

print('Example:')

print(most_frequent([

'a', 'b', 'c',

'a', 'b',

'a'

]))

assert most_frequent([    'a', 'b', 'c',     'a', 'b',    'a']) == 'a'assert most_frequent(['a', 'a', 'bi', 'bi', 'bi']) == 'bi'print('Done')

元组（Easy Unpack）

def easy_unpack(elements):

"""

returns a tuple with 3 elements - first, third and second to the last

"""

your code here

a =(elements[0],elements[2],elements[-2])return a

if name == 'main':

#These "asserts" using only for self-checking and not necessary for auto-testing

assert easy_unpack((1, 2, 3, 4, 5, 6, 7, 9)) == (1, 3, 7)

assert easy_unpack((1, 1, 1, 1)) == (1, 1, 1)

assert easy_unpack((6, 3, 7)) == (6, 7, 3)

print('Done! Go Check!')

时间（date_time）

def date_time(time):

#replace this for solution

dict={'01':'January','02':'February','03':'March','04':'April','05':'May','06':'June','07':'July','08':

'August','09':'September','10':'October','11':'November','12':'December'}

a = int(time[0:2])

b= int(time[11:13])

c= int(time[14:16])

if c==1 and b==1:

time= str(a)+' '+dict[time[3:5]]+' '+time[6:10]+' year '+str(b)+' hour '+str(c)+' minute'

return time

else:

time= str(a)+' '+dict[time[3:5]]+' '+time[6:10]+' year '+str(b)+' hours '+str(c)+' minutes'

return time

if name == 'main':

print("Example:")

print(date_time('01.01.2000 00:00'))

#These "asserts" using only for self-checking and not necessary for auto-testingassert date_time("01.01.2000 00:00") == "1 January 2000 year 0 hours 0 minutes", "Millenium"assert date_time("09.05.1945 06:30") == "9 May 1945 year 6 hours 30 minutes", "Victory"assert date_time("20.11.1990 03:55") == "20 November 1990 year 3 hours 55 minutes", "Somebody was born"print("Coding complete? Click 'Check' to earn cool rewards!")

转载于:https://blog.51cto.com/12903345/2104119

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