# Q1

mystery = '\U0001f4a9'

import unicodedata

print(unicodedata.name(mystery))

# Q2

pop_bytes = mystery.encode('utf8')

print(pop_bytes)

# Q3

pop_string = pop_bytes.decode('utf8')

print(pop_string)

print(mystery == pop_string)

# Q4

poem = '''My kitty cat likes %s

My kitty cat likes %s

My kitty cat fell down his %s

And now he's a %s

'''

args = ('roast beef', 'ham', 'head', 'clam')

print(poem % args)

# Q5

# 太长了，我就不写了

letter = '''Hello, {name}'''

# Q6

response = {'name': 'yitian'}

print(letter.format(**response))

# Q7

mammoth = '''\

We have seen thee, queen of cheese,

Lying quietly at your ease,

Gently fanned by evening breeze,

Thy fair form no flies dare seize.

All gaily dressed soon you'll go

To the great Provincial show,

To be admired by many a beau

In the city of Toronto.

Cows numerous as a swarm of bees,

Or as the leaves upon the trees,

It did require to make thee please,

And stand unrivalled, queen of cheese.

May you not receive a scar as

We have heard that Mr. Harris

Intends to send you off as far as

The great world's show at Paris.

Of the youth beware of these,

For some of them might rudely squeeze

And bite your cheek, then songs or glees

We could not sing, oh! queen of cheese.

We'rt thou suspended from balloon,

You'd cast a shade even at noon,

Folks would think it was the moon

About to fall and crush them soon.'''

# Q8

import re

results = re.findall(r'\bc\w*', mammoth)

print(results)

# Q9

results = re.findall(r'\bc\w{3}\b', mammoth)

print(results)

# Q10

results = re.findall(r'\b\w*r\b', mammoth)

print(results)

# Q11

results = re.findall(r'\b\w*[aeiou]{3}[^aeiou\s]*\w*\b', mammoth)

print(results)

# Q12

import binascii

hex_str = '47494638396101000100800000000000ffffff21f9' + \

'0401000000002c000000000100010000020144003b'

gif = binascii.unhexlify(hex_str)

# Q13

is_valid_gif = gif[:6] == b'GIF89a'

print(is_valid_gif)

# Q14

import struct

width, height = struct.unpack('<HH', gif[6:10])

print((width, height))