python school---12hr To 24hr Time

—12hr To 24hr Time

time24hr(‘12:34am’)
‘0034hr’

time24hr(‘12:15pm’)
‘1215hr’

def time24hr(tstr):
	#flag为‘a’或者‘p’
	flag = tstr[-2]
	#将输入tstr转换为["时", "分"]格式
	time24hr = tstr[-2:]split(':')

	#当flag == ‘a’时，仅需判断时为12时输出00，
	#当flag == ‘p’时，需判断时为12时输出12，其他情况输出时+12
	if time24hr[0] == '12':
		if flag == 'a':
			return '00' + '%02d' % int(time24hr[1]) + 'hr'
		else:
			return '%02d' % int(time24hr[0]) + '%02d' % int(time24hr[1]) + 'hr'
	else:
		if flag == 'p':
			return '%02d' % (int(time24hr[0]) + 12) + '%02d' % int(time24hr[1]) + 'hr'
	return '%02d' % int(time24hr[0]) + '%02d' % int(time24hr[1]) + 'hr'