print('Hello')
print("Hello")
s = '\u0048\u0065\u006c\u006c\u006f'
print(s)
print("Hello'World")
print('Hello"World')

s = 'Hello\n World'
print(s)
s = 'Hello\u000a World'
print(s)
s = 'Hello\t World'
print(s)
s = 'Hello\' World'
print(s)
s = 'Hello\" World'
print(s)
s = 'Hello\\ World'
print(s)

s = 'Hello\n World'
print(s)
s = r'Hello\n World'
print(s)

s = """
     《早发白帝城》
朝辞白帝彩云间，千里江陵一日还。
两岸猿声啼不住，轻舟已过万重山。
"""
print(s)

print(int("80"))
print(float("80.0"))
print(int("AB",16))

print(str(123))
money = 5834.5678
print(str(money))
print(str(True))

i = 32
s = 'i * i = ' + str(i * i)
print(s)
s = 'i * i = {}'.format(i * i)
print(s)
s = '{0} * {0} = {1}'.format(i,i * i)
print(s)
s = '{p1} * {p1} = {p2}'.format(p1=i,p2=i * i)
print(s)
money = 5834.5678
name = 'Tony'
print('{0:s}年龄{1:d},工资是{2:f}元。'.format(name,20,money))
print('{0}年龄{1},工资是{2:0.2f}元。'.format(name,20,money))
print('{0}今天收入是{1:G}元。'.format(name,money))
print('{0}今天收入是{1:g}元。'.format(name,money))
print('{0}今天收入是{1:e}元。'.format(name,money))
print('{0}今天收入是{1:E}元。'.format(name,money))
print('十进制数{0:d}的八进制表示为{0:o}'.format(18))
print('十进制数{0:d}的十六进制表示为{0:x}'.format(18))

s_str = 'Hello World'
print(s_str.find('e'))
print(s_str.find('l'))
print(s_str.find('l',4))
print(s_str.find('l',4,6))

text = 'AB CD EF GH IJ'
print(text.replace(' ','|',2))
print(text.replace(' ','|'))
print(text.replace(' ','|',1))

text = 'AB CD EF GH IJ'
print(text.split(' '))
print(text.split(' ',maxsplit=0))
print(text.split(' ',maxsplit=1))
print(text.split(' ',maxsplit=2))

wordstring = '''
    it was the best of times it was the worst of times. 
    it was the age of wisdom it was the age of foolishness.
    '''
wordstring = wordstring.replace('.',' ')
wordlist = wordstring.split()
wordfreq = []
for w in wordlist:
    wordfreq.append(wordlist.count(w))
d = dict(zip(wordlist,wordfreq))
print(d)