第一周python 作业:第二章课后练习题
2-1 简单消息: 将一条消息存储到变量中,再将其打印出来。
代码:
message = "hello Python world!"
print(message)
结果:
hello Python world!
2-2 多条简单信息:将一条信息存储到变量中,将其打印出来,再将变量的值修改为一条新消息,并将其打印出来。
代码:
message = "hello Python world!"
print(message)
message = "HELLO PYTHON WORLD!"
print(message)
结果:
hello Python world!
HELLO PYTHON WORLD!
2-3 个性化消息:将用户的姓名存到一个变量中,并向该用户显示一条信息。显示的信息应非常简单,如“Hello Eric, would you like to learn some Python today?”
代码:
full_name = "Eric"
print('"Hello ' + full_name + ', would you like to learn some Python today?"')
结果:
"Hello Eric, would you like to learn some Python today?"
2-4 调整名字的大小写:将一个人名字存储到一个变量中,再以小写、大写和首字母大写的方式显示这个人名。
代码:
full_name = "Eric"
print(full_name.lower())
print(full_name.upper())
print(full_name.title())
结果:
eric
ERIC
Eric
2-5 名言:找一句你钦佩的名人说的名言,将这个名人的姓名和他的名言打印出来。输出应类似于下面这样(包括引号):
Albert Einstein once said, "A person who never made a mistake never tried anything new."
代码:
famous_person = "Albert Einstein"
message = '"A person who never made a mistake never tried anything new."'
print(famous_person +" once said, " + message)
结果:
Albert Einstein once said, "A person who never made a mistake never tried anything new."
2-6 名言2: 重复2-5的练习,但将名人的姓名存储到变量famous_person中,再创建要显示的消息,并将消息存储在变量message中,然后打印这条消息。
代码:
famous_person = "Albert Einstein"
message = '"A person who never made a mistake never tried anything new."'
print(famous_person +" once said, " + message)
结果:
Albert Einstein once said, "A person who never made a mistake never tried anything new."
2-7 删除人名中的空白:存储一个人名,并在其开头和末尾都包含一些空白字符,务必至少使用字符组合"\t"和"\n"各一次。打印这个人名,以显示其开头和末尾的空白。然后,分别使用剔除函数lstrip(), rstrip(), 和strip()对人名进行处理,并将结果打印出来。
代码:
full_name = " Albert Einstein "
print(full_name+"\n")
print("\t"+full_name)
print(full_name.lstrip())
print(full_name.rstrip())
print(full_name.strip())
结果:
Albert Einstein
Albert Einstein
Albert Einstein
Albert Einstein
Albert Einstein
2-8 数字8: 编写4个表达式,它们分别使用加法、减法、乘法和除法运算,但结果都是数字8。
代码:
print(5+3)
print(9-1)
print(2*4)
print(int(16/2))
结果:
8
8
8
8
2-9 最喜欢的数字: 将你最喜欢的数字存储在一个变量中,再使用这个变量创建一条信息,指出你最喜欢的数字,然后将这条消息打印出来。
代码:
message = 100
print("My favorite number is " + str(message) + ".")
结果:
My favorite number is 100.
2-10 加注释: 在程序开头加上姓名和日期
#zengzhichao march 11th
message = 100
print("My favorite number is " + str(message))
2-11 Python 之禅: 在python终端会话中执行命令import this,并粗略地浏览一下其他的指导原则