问题描述
所以我想创建一个登录页面,但缩进变得很麻烦,我是Python的新手,而我所做的一切似乎总是使它混乱。
if StartingPrompt == "l":
username_2 = input("Enter your username: ")
password = input("Enter your password: ")
else:
print("Please only enter 's' or 'l' ")
return StartingPrompt
解决方法
您的缩进被弄乱了。
$2
,
假设您在其他地方初始化了StartingPrompt,则代码应如下所示:
if StartingPrompt == "l":
username_2 = input("Enter your username: ")
password = input("Enter your password: ")
else:
print("Please only enter 's' or 'l' ")
在每个if
语句之后,您需要缩进块; def
(功能),try-except
等也是如此。
例如:
if <condition>:
# indent
print("Inside if-body.")
elif <condition>:
# indent
print("Inside elif-body.")
else:
# indent
print("Inside else-body.")
# back to original indentation
print("Outside of if-statment.")
您也有一个return
语句,但是您不需要此语句,因为您的代码未包含在函数中。如果您想使用功能:
def login():
# indent here (inside function body)
StartingPrompt = input("Please enter option: ")
if StartingPrompt == "l":
username_2 = input("Enter your username: ")
password = input("Enter your password: ")
else:
print("Please only enter 's' or 'l' ")
return StartingPrompt
,
修正缩进(在password
,else
,return
附近):
def YOUR_FUNCTION():
if StartingPrompt == "l":
username_2 = input("Enter your username: ")
password = input("Enter your password: ")
else:
print("Please only enter 's' or 'l' ")
return StartingPrompt
,
添加注释以保持清晰。
if StartingPrompt == "l":
username_2 = input("Enter your username: ")
password = input("Enter your password: ") # one tab indent here
else: # one un-indent here
print("Please only enter 's' or 'l' ")
return StartingPrompt
,
我不知道您是否习惯于编程,但尝试将python缩进视为其他语言中的()。 python中的缩进与图层相同。除非您已完成声明,否则您需要留在同一层。
<table id="grid" width="100%" border="1" cellspacing="0" cellpadding="0">
<tbody>
<tr>
<td>a</td>
<td>a</td>
<td>a</td>
<td>a
<div id="DivToShow" >
<button onClick="edit('a')">Edit</button>
<button onClick="dup('a')">Dup</button>
<button onClick="remove('a')">Delete</button>
</div>
</td>
</tr>
<tr >
<td>b</td>
<td>b</td>
<td>b</td>
<td>b
<div id="DivToShow" >
<button onClick="edit('b')">Edit</button>
<button onClick="dup('b')">Dup</button>
<button onClick="remove('b')">Delete</button>
</div>
</td>
</tr>
<tr>
<td>c</td>
<td>c</td>
<td>c</td>
<td>c
<div id="DivToShow" >
<button onClick="edit('c')">Edit</button>
<button onClick="dup('c')">Dup</button>
<button onClick="remove('c')">Delete</button>
</div>
</td>
</tr>
<tr >
<td>d</td>
<td>d</td>
<td>d</td>
<td>d
<div id="DivToShow" >
<button onClick="edit('d')">Edit</button>
<button onClick="dup('d')">Dup</button>
<button onClick="remove('d')">Delete</button>
</div>
</td>
</tr>
<tr>
<td>e</td>
<td>e</td>
<td>e</td>
<td>e
<div id="DivToShow" >
<button onClick="edit('e')">Edit</button>
<button onClick="dup('e')">Dup</button>
<button onClick="delete('e')">Delete</button>
</div>
</td>
</tr>
</tbody>
</table>
,
使用4个空格进行缩进。阅读PEP 8以获得更多样式指南。
if StartingPrompt == "l":
username_2 = input("Enter your username: ")
password = input("Enter your password: ")
else:
print("Please only enter 's' or 'l' ")
return StartingPrompt