第一题

杨辉三角

N = 8
t = [[0 for i in range(N)] for i in range(N)]  # 二维list 8*8
for i in range(N):
    for j in range(i + 1):
        if j == 0 | j == i:
            t[i][j] = 1
        else:
            t[i][j] = t[i - 1][j] + t[i - 1][j - 1]
        print(t[i][j], end=' ')
    print()

1 
1 1 
1 2 1 
1 3 3 1 
1 4 6 4 1 
1 5 10 10 5 1 
1 6 15 20 15 6 1 
1 7 21 35 35 21 7 1 
[6, 1, 3, 3, 1, 3, 7, 2, 1, 6, 3, 1, 6, 1, 6, 2, 2, 6, 3, 1, 3]

第二题

set 解法

poetry = """
桃之夭夭，灼灼其华。
之子于归，宜其室家。
桃之夭夭，有蕡其实。
之子于归，宜其家室。
桃之夭夭，其叶蓁蓁。
之子于归，宜其家人。
"""

p_set = list(set(poetry))
p_count = [[] for i in range(len(p_set))]  # 创建二维数组
for i in range(len(p_set)):
    p_count[i] = poetry.count(p_set[i])
print(p_count)
for i in range(len(p_set)):
    if p_set[i] == "\n" or p_set[i] == "":
        continue
    print("{} 出现了 {}次".format(p_set[i], p_count[i]))

poetry 简单方法

print("*******方法二*******")
for i in p_set:
    if i == '\n': continue
    count_s = poetry.count(i)
    print("{} 出现了 {}次".format(i, count_s))

之 出现了 6次
实 出现了 1次
于 出现了 3次
桃 出现了 3次
有 出现了 1次
宜 出现了 3次
蓁 出现了 2次
人 出现了 1次
夭 出现了 6次
子 出现了 3次
华 出现了 1次
。 出现了 6次
叶 出现了 1次
其 出现了 6次
灼 出现了 2次
室 出现了 2次
， 出现了 6次
归 出现了 3次
蕡 出现了 1次
家 出现了 3次

第三题

Star

english = """Twinkle, twinkle, little star
How I wonder what you are
Up above the world so high
Like a diamond in the sky.
Twinkle, twinkle, little star
How I wonder what you are
When the blazing sun is gone,
When he nothing shines upon
Then you show your little light
Twinkle, twinkle, all the night.
Twinkle, twinkle, little star
How I wonder what you are
Then the traveller in the dark,
Thanks you for your tiny spark,
Could he see which way to go,
If you did not twinkle so.
Twinkle, twinkle, little star
How I wonder what you are
In the dark blue sky you keep,
Often through my curtains peep,
For you never shut your eye,
Till the sun is in the sky.
Twinkle, twinkle, little star.

一闪一闪小星星

How I wonder what you are."""

english = english.replace(',', '')
english = english.replace('\n', '')
english = english.replace('.', ' ')
english = english.replace('一闪一闪小星星', '')
english = english.lower()
english = english.split(' ')
e_set = list(set(english))
print(e_set)
for i in e_set:
    if i == '': continue
    count_s = english.count(i)
    print("{}  {}".format(i, count_s))

['', 'peepfor', 'my', 'diamond', 'above', 'little', 'dark', 'in', 'all', 'world', 'lighttwinkle', 'areup', 'he', 'how', 'you', 'star', 'highlike', 'darkthanks', 'eyetill', 'traveller', 'i', 'blue', 'keepoften', 'shines', 'your', 'curtains', 'so', 'arethen', 'are', 'uponthen', 'is', 'nothing', 'see', 'which', 'to', 'for', 'what', 'arein', 'night', 'not', 'twinkle', 'starhow', 'did', 'show', 'tiny', 'way', 'sparkcould', 'shut', 'arewhen', 'through', 'blazing', 'gonewhen', 'sun', 'wonder', 'the', 'goif', 'sky', 'never', 'a']

peepfor  1
my  1
diamond  1
above  1
little  6
dark  1
in  3
all  1
world  1
lighttwinkle  1
areup  1
he  2
how  1
you  10
star  1
highlike  1
darkthanks  1
eyetill  1
traveller  1
i  5
blue  1
keepoften  1
shines  1
your  3
curtains  1
so  2
arethen  1
are  1
uponthen  1
is  2
nothing  1
see  1
which  1
to  1
for  1
what  5
arein  1
night  1
not  1
twinkle  12
starhow  4
did  1
show  1
tiny  1
way  1
sparkcould  1
shut  1
arewhen  1
through  1
blazing  1
gonewhen  1
sun  2
wonder  5
the  9
goif  1
sky  3
never  1
a  1