python if-statement与IndentationError

Question

我已经写了一个函数来获取数据库中的命令，现在我试图写一个具有更多指定细节的函数以输入到数据库中。但是当我添加一个elif statement时会出错

之前：（成功）（ps：用户首先要输入命令的功能，如果用户在设备按钮中输入“ switch”，他将从我的交换机表中获取命令，否则将从路由器中获取命令”）：

def readciscodevice(function, device):
        conn = sqlite3.connect('server.db')
        cur = conn.cursor()
        if device == "switch":
                cur.execute(
                        "SELECT DISTINCT command FROM switch WHERE   function =? or function='configure terminal' or function='enable'  ORDER BY key ASC",
                        (function,))
                read = cur.fetchall()
                return read
        elif device == "router":
                cur.execute(
                        "SELECT DISTINCT command FROM router WHERE   function =? or function='configure terminal' or function='enable'  ORDER BY key ASC",
                        (function,))
                read = cur.fetchall()
                return read;
a = input("function:")
b = input("device:")
for result in readciscodevice(a,b):
        print(result[0])

然后，我试图创建一个名为“ showcommand”的表，因为show命令不需要按“ configure terminal”，因此我将再做一个if语句，但它似乎不起作用...

在添加if语句之后：

def readciscodevice(function, device):
        conn = sqlite3.connect('server.db')
        cur = conn.cursor()
        if device == "switch":
                cur.execute(
                        "SELECT DISTINCT command FROM switch WHERE   function =? or function='configure terminal' or function='enable'  ORDER BY key ASC",
                        (function,))
                read = cur.fetchall()
                return read
        elif device == "router":
                cur.execute(
                        "SELECT DISTINCT command FROM router WHERE   function =? or function='configure terminal' or function='enable'  ORDER BY key ASC",
                        (function,))
                read = cur.fetchall()
                return read;
        elif device == "showcommand":
                 cur.execute(
                        "SELECT DISTINCT command FROM showcommand WHERE   function =? or  function='enable'  ORDER BY key ASC",
                        (function,))
                read = cur.fetchall()
                return read;


a = input("function:")
b = input("device:")
for result in readciscodevice(a,b):
        print(result[0])

主要错误（这是我最后的elif语句[showcommand]）：

read = cur.fetchall()
IndentationError: unindent does not match any outer indentation level

并返回读取；

Trailing semicolon in the statement less... (Ctrl+F1) 
This inspection detects trailing semicolons in statements.

我不知道这是怎么回事？ 在我看来，这没有任何问题，但问题是真实的。 感谢您的帮助！

Answer 1

您只有一个空格缩进，不应缩进

    elif device == "showcommand":
            cur.execute(
                    "SELECT DISTINCT command FROM showcommand WHERE   function =? or  function='enable'  ORDER BY key ASC",
                    (function,))
            read = cur.fetchall()
            return read;

Answer 2

该块中开始cur.execute的那行似乎比其他行缩进了一个空格。