Python 字符串的大小写(一)

字符串capitalize用法

str.capitalize()

首字母大写 其余字母小写

	# coding:utf-8
	name = 'xiao mu'
	info = 'hello 小慕'
	_info = '小慕 hello'
	number_str = '1314'
	new_info = info.capitalize()
	_new_info = _info.capitalize()
	new_number_str = number_str.capitalize()
	print(name)
	print(new_info)
	print(_new_info)
	print(new_number_str)
	print('abc'.capitalize())
	print(name.capitalize())

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字符串lower & casefold用法

str.lower()

str.casefold()

用法相同均为小写字符串中字母

注意:若字符串为空也不会报错

	# coding:utf-8
	message_en = 'How do you do? Xiaomu'
	message_ch = '你好呀, XiaoMu'
	message_mix = '你好呀, Xiaomu, 今天是星期三!'
	message_en_lower = message_en.lower()
	message_en_casefold = message_en.casefold()
	message_ch_lower = message_ch.lower()
	message_ch_casefold = message_ch.casefold()
	message_mix_lower =message_mix.lower()
	message_mix_casefold = message_mix.casefold()
	print(message_en_lower, message_en_casefold)
	print(message_ch_lower, message_ch_casefold)
	print(message_mix_lower, message_mix_casefold)
	empty = ''
	empty_lower = empty.lower()
	empty_casefold = empty.casefold()
	print('.' + empty_lower + '.', '.' + empty_casefold + '.')

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