零基础自学python复习基础 每日一练 【一个小时的练习】

        1.isidentifier()

#isidentifier()
print('cf'.isidentifier())
print('cf_'.isidentifier())
print('cf_1'.isidentifier())
print('isidentifier()23'.isidentifier())
print('_cf'.isidentifier())
print('cf1'.isidentifier())

        2. isspace()

# isspace()
print(' '.isspace())
print(' nisspace'.isspace())
print('isspace'.isspace())
print('t'.isspace())
print('r'.isspace())
print('d'.isspace())
print('12123'.isspace())

        3.isalpha()

#isalpha()
print('isalpha()'.isalpha())
print('isalpha'.isalpha())
print('1223'.isalpha())
print(''.isalpha())
print('n'.isalpha())
print('t'.isalpha())

        4.isdecimal()

#isdecimal()
print('121'.isdecimal())
print('0101'.isdecimal())
print('cf'.isdecimal())
print('cf_1'.isdecimal())
print('n'.isdecimal())
print('1'.isdecimal())
print('0'.isdecimal())

        5.isnumeric()

#isnumeric()
print('isdecimal()'.isnumeric())
print('12233'.isnumeric())
print('cf_17'.isnumeric())
print('2022'.isnumeric())

        6.isalnum()

#isalnum()
print('isalnum'.isalnum())
print('cf_1'.isalnum())
print('2022'.isalnum())
print('cf_2017'.isalnum())
print('cf2022'.isalnum())
print('python2022'.isalnum())
print('人生苦短，我用python'.isalnum())

        7.replace()

#replace()
x = '铠甲勇士,60集'
print(x.replace('铠甲勇士','铠甲勇士刑天'))
x_ = 'join(),replace(),join(),join(),replace()'
print(x_.replace('replace()','cf(上号)',2))
x_1 = '李白，杜甫，孟浩然，曹操'
print(x_1.replace('曹操','王之涣'))
x_2 = '君不见黄河之水天上来，奔流到海不复回。'
print(x_2.replace('君不见黄河之水天上来，奔流到海不复回。','天生我材必有用，千金散尽还复来。'))
x_3 ='日照香炉生紫烟，遥看瀑布挂前川。'
print(x_3.replace('日照香炉生紫烟，遥看瀑布挂前川。','飞流直下三千尺，疑是银河落九天。'))

        8.join()

#join()
x = '日照香炉生紫烟，遥看瀑布挂前川。飞流直下三千尺，疑是银河落九天。'
print(' n'.join(x))
x_ = '花间一壶酒，独酌无相亲。举杯邀明月，对影成三人。'
print('nt'.join(x_))
x_1 = '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('.'.join(x_1))
x_2 = '仰天大笑出门去，我辈岂是蓬蒿人！'
print('-'.join(x_2))
x_3 ='抽刀断水水更流，举杯消愁愁更愁。'
print('.'.join(x_3))

        9.字符串的切片

#字符串的切片
x = '登高壮天地间，大江茫茫去不还。'
print(x[:3])
x_= '天子呼来不上船，自称臣是酒中仙。'
print(x_[:7] + x_[7:])
print(x_[:3]+x_[3:7])
x_1 = '山随平野尽，江入大荒流。'
print(x_1[0:5])
print(x_1[0:-5])
print(x_1[0:-1])
x_2 = ' 誓不摧眉折腰事权贵，使我不得开心颜！'
print(x_2[0:-20])
print(x_2[0:-1])
print(x_2[0:11])
print(x_2[11:20])
x_3 = '眼前又景道不得，崔颢题诗在上头！'
print(x_3[0:8])
print(x_3[8:16])
print(x_3[0:-1])
print(x_3[0:16])

        10.比较字符串

#比较字符串
x = 'python'
x_ = 'python'
print(x == x_)
print(x > x_)
print(x < x_)
print(x <= x_)
print(x >= x_)
print(x != x_)
x = '花间一壶酒'
x_ = '独酌无相亲'
print(x == x_)
print(x > x_)
print(x < x_)
print(x <= x_)
print(x >= x_)
print(x != x_)
x = '@$%^'
x_ = '&^*+-/ '
print(x == x_)
print(x > x_)
print(x < x_)
print(x <= x_)
print(x >= x_)
print(x != x_)
x = '010101'
x_ = '10101010'
print(x == x_)
print(x > x_)
print(x < x_)
print(x <= x_)
print(x >= x_)
print(x != x_)
x = '举头望明月，低头思故乡。'
x_ = ' 飞流直下三千尺，疑是银河落九天。'
print(x == x_)
print(x > x_)
print(x < x_)
print(x <= x_)
print(x >= x_)
print(x != x_)