# encoding:utf-8

# 切片slice

# str1 = 'pennyisa girl'

#

# print(str1[1:5])

#

# a = [1, 2, 3, 4, 5, 6, 7, 8, 9]

# print(a[0:2])

# 查找 find

# str1 = 'pennyisa girl'

#

# print(str1.find('n',0))

# print(str1.find('n',3))

# print(str1.find('n',4))

# 替换 replace

# str1 = 'penny is a girl'

#

# print(str1.replace("girl","boy"))

# 分割 splite

# str1 = 'penny is a girl'

# print(str1.split())

# print(str1.split('n'))

# print(str1.split('i',2))

# 合并 join

# str1 = 'penny is a girl'

# str2 = 'single is a boy'

# print(''.join(str2))

# print(''.join(str1))

# 首字母大写 capitalize

# str1 = 'penny is a girl.'

# print(str1.capitalize())

# 大写字母 upper

# str1 = 'penny is a girl.'

# print(str1)

# print(str1.upper())

# 小写字母 lower

# str1 = 'penny is a girl.'

# print(str1)

# print(str1.upper())

# print(str1.upper().lower())

# 去重空白字符 strip  删除头尾指定的字符

# str1 = 'penny is a girl.'

# print(str1.strip('p'))

# 拼接 +

# str1 = 'penny is a girl'

# str2 = 'and'

# str3 = 'single is a boy.'

# str4 = ' '

# str5 = str1.capitalize() + str4 + str2 + str4 + str3

# print(str5)

# 统计次数 count

# str1 = 'penny is a girl'

# str2 = 'and'

# str3 = 'single is a boy.'

# str4 = ' '

# str5 = str1.capitalize() + str4 + str2 + str4 + str3

#

# print(str5, str5.count('n'))

#初始化 format

# str1 = 'penny is a girl'

# print("当前语句是:{0}.".format(str1))