• Python_day3


    字符串 将用户输入字符串中的大写成员转小写,小写成员转大写
    ord() chr()

    s = input('str:')
    
    new_str = ''
    for i in s:
    	if 'a' <= i <= 'z':
    		# new_str += chr(ord(i) - (ord('a')-ord('A')))
    		new_str += i.upper()
    	elif 'A' <= i <= 'Z':
    		# new_str += chr(ord(i) + (ord('a')-ord('A')))
    		new_str += i.lower()
    	else:
    		new_str += i
    print(new_str)
    

     可变的序列类型:

    •     列表list
    # 定义
    l = [] l = [1,2,3,'hello', [11,22]] ls = list('hello') ls2 = list(range(100)) print(ls) print(ls2) # 索引 print(l[0]) print(l[4]) print(l[4][0]) # 切片 print(l[:4]) print(l[1:]) print(l[1::2]) # 增 l[1:1] = [100] print(l) l.append(110) print(l) l.insert(2, 119) print(l) # 删 l[1:3] = [] print(l) l.pop(3) print(l) l.remove([11,22]) print(l) # 修改 l[0] = 120 l[1:3]

    有序的不可变的序列类型:

    •   元组tuple
    # 定义
    t = () print(type(t)) t1 = (1,) print(type(t1)) t2 = tuple([1,2,3,4, 'hello']) print(t2) # 索引 切片 print(t2[0]) print(t2[::-1]) print(t2) # 成员运算符 for t in t2: print(t) print('*****************************') t3 = (5,6,2,12,7,8,7,1,100) print(max(t3)) print(min(t3)) print(len(t3)) print(t3.index(7)) print(t3.count(7))

     练习题 (字符串补充)

    import random
    
    words = ('hello', 'python', 'boys', 'apple', 'world', 'eat')
    
    # 'apple'
    word = random.choice(words)
    
    # 'palep'
    save = word
    '''
    rand_str = ''
    while word: # 不是空串
    	rand_ind = random.randrange(len(word)) # random.choice(range(len(word)))
    	rand_str += word[rand_ind]	
    	word = word[:rand_ind]+word[rand_ind+1:] # 切除抽取的成员
    '''
    listword = list(word)
    random.shuffle(listword)
    rand_str = ''.join(listword)
    
    
    print('请猜测%s是什么单词, 你有三次机会:' % rand_str)
    
    for i in range(3):
    	input_str = input('第%d次:' % (i+1))
    	if input_str == save:
    		print('恭喜你!答对了')
    		break
    	else:
    		if i < 2:
    			print('很遗憾!再试一次')
    		else:
    			print('游戏结束!已经没有机会了')
    

     Δ   1

    '''
    1990.1.1 星期1
    2018.11.1
    '''
    
    year, month = eval(input('请输入年份和月份(year,month):'))
    
    sumdays = 0
    # 1990~year
    for y in range(1990, year):
    	sumdays += (365+(1 if (y % 4 == 0 and y % 100 != 0 or y % 400 == 0) else 0))
    
    # year.1.1 ~ year.month.1
    for m in range(1, month):
    	if m == 1 or m == 3 or m == 5 or m == 7 or 
    		m == 8 or m == 10 or m == 12:
    		sumdays += 31 
    	elif m == 4 or m == 6 or m == 9 or m == 11:
    		sumdays += 30
    	else:
    		if year % 4 == 0 and year % 100 != 0 or year % 400 == 0:
    			sumdays += 29
    		else:
    			sumdays += 28
    
    sumdays += 1
    
    weekday = sumdays % 7
    
    # 计算month月有多少天
    if month == 1 or month == 3 or month == 5 or month == 7 or 
    	month == 8 or month == 10 or month == 12:
    	monthdays = 31 
    elif month == 4 or month == 6 or month == 9 or month == 11:
    	monthdays = 30
    else:
    	if year % 4 == 0 and year % 100 != 0 or year % 400 == 0:
    		monthdays = 29
    	else:
    		monthdays = 28
    
    # 打印日历
    m = '一二三四五六七八九十'
    if month == 11:
    	monthstr = '十一'
    elif month == 12:
    	monthstr = '十二'
    else:
    	monthstr = m[month-1]
    print('33[34m{:>7}月 {}'.format(monthstr, year))
    print('33[0m', end='') # 关闭属性
    print('33[47m日 一 二 三 四 五 六')
    print('33[0m', end='') # 关闭属性
    print('   '*weekday, end='')
    for d in range(1, monthdays+1):
    	print('{:>2}'.format(d), end=' ' if (weekday+d)%7 else '
    ')	
    print()
    

     Δ 2

    '''
    1990.1.1 星期1
    2018.11.1
    '''
    
    days31 = [1,3,5,7,8,10,12]
    days30 = [4,6,9,11]
    
    year, month = eval(input('请输入年份和月份(year,month):'))
    
    sumdays = 0
    # 1990~year
    for y in range(1990, year):
    	sumdays += (365+(1 if (y % 4 == 0 and y % 100 != 0 or y % 400 == 0) else 0))
    
    # year.1.1 ~ year.month.1
    for m in range(1, month):
    	if m in days31:
    		sumdays += 31 
    	elif m in days30:
    		sumdays += 30
    	else:
    		sumdays += (29 if year % 4 == 0 and year % 100 != 0 or year % 400 == 0 else 28)
    
    sumdays += 1
    
    weekday = sumdays % 7
    
    # 计算month月有多少天
    if month in days31: 
    	monthdays = 31 
    elif month in days30:
    	monthdays = 30
    else:
    	if year % 4 == 0 and year % 100 != 0 or year % 400 == 0:
    		monthdays = 29
    	else:
    		monthdays = 28
    
    # 打印日历
    m = '一二三四五六七八九十'
    if month == 11:
    	monthstr = '十一'
    elif month == 12:
    	monthstr = '十二'
    else:
    	monthstr = m[month-1]
    print('33[34m{:>7}月 {}'.format(monthstr, year))
    print('33[0m', end='') # 关闭属性
    print('33[47m日 一 二 三 四 五 六')
    print('33[0m', end='') # 关闭属性
    print('   '*weekday, end='')
    for d in range(1, monthdays+1):
    	print('{:>2}'.format(d), end=' ' if (weekday+d)%7 else '
    ')	
    print()
    

      

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  • 原文地址:https://www.cnblogs.com/ZHang-/p/10084327.html
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