python学习4——提问

Posted 2020-12-31 shannon-v

一、打印出改变了的输出。

因为没有任何计算机基础，所以出错很多，摸索了一会。

出错1：

print("How old are you?"),
age = raw_input()
print("What is your name?"),
name = raw_input()
print("How tall are you?"),
height = raw_input()
print("So your name is %r, you are %r years old and %r tall." , %name,age,height)

 输出结果

E:abc>python 6.py
How old are you?
Traceback (most recent call last):
File "6.py", line 2, in <module>
age = raw_input()
NameError: name ‘raw_input‘ is not defined

原因：python3中将raw_input()命令改为input()，所以不能会有未定义错误。

出错2：

print("How old are you?"),
age = input()
print("What is your name?"),
name = input()
print("How tall are you?"),
height = input()
print("So your name is %r, you are %r years old and %r tall." , %name,age,height)

输出结果

E:abc>python 6.py
File "6.py", line 7
print("So your name is %r, you are %r years old and %r tall.", %name,age,height)

^
SyntaxError: invalid syntax

原因：

%符号前面不应该有：逗号，

出错3：

print("How old are you?"),
age = input()
print("What is your name?"),
name = input()
print("How tall are you?"),
height = input()
print("So your name is %r, you are %r years old and %r tall."  %name,age,height)

输出结果

E:abc>python 6.py
How old are you?
20
What is your name?
jack
How tall are you?
189
Traceback (most recent call last):
File "6.py", line 7, in <module>
print("So your name is %r, you are %r years old and %r tall." %name,age,height)
TypeError: not enough arguments for format string

原因：

% 后定义的变量需要用()引用

最终正确的代码如下：

print("How old are you?"),
age = input()
print("What is your name?"),
name = input()
print("How tall are you?"),
height = input()
print("So your name is %r, you are %r years old and %r tall." %(name,age,height))

输出结果：

E:abc>python 6.py
How old are you?
18
What is your name?
lucy
How tall are you?
168
So your name is ‘lucy‘, you are ‘18‘ years old and ‘168‘ tall.