This question already has an answer here: Replacements for switch statement in Python? 44 answers Try using a dictionary setting in which the key is the value that you are testing for and the entry for that key is a function to process. Some of the text books on Python point out that this is a more elegant solution than a series of if ... elif statements and picks up the entry immediately i
这个问题在这里已经有了答案： 替代Python中的switch语句？ 44个答案 尝试使用字典设置，其中密钥是您正在测试的值，并且该密钥的条目是要处理的函数。 一些关于Python的教科书指出，这是比一系列if ... elif语句更优雅的解决方案，并立即获取条目，而不必测试每种可能性。 请注意，因为每个键都可以是任何类型，所以这比C中的switch语句更好，这需要switch参数和case为整数值。 例如。 def default(command) print
This question already has an answer here: Replacements for switch statement in Python? 44 answers Python does not implement a switch . An alternative is using a dict like so: def func1(): pass def func2(): pass switch = { "do1": func1, "do2": func2, } do_str = "do1" switch[do_str]()
这个问题在这里已经有了答案： 替代Python中的switch语句？ 44个答案 Python没有实现一个switch 。 另一种方法是使用像这样的字典： def func1(): pass def func2(): pass switch = { "do1": func1, "do2": func2, } do_str = "do1" switch[do_str]()
Possible Duplicate: Replacements for switch statement in python? Suppose I have a list in Python: list = ('ADD', 'SUB', 'PUSH', 'POP') I want to run a function depending on input, and that input can be any value in the list. Instead of writing a switch case statement for each element in list , is there a more compact way of writing it? My reasoning is f
可能重复： python中switch语句的替代？ 假设我在Python中有一个列表： list =（'ADD'，'SUB'，'PUSH'，'POP'） 我想根据输入运行一个函数，并且该输入可以是列表中的任何值。 而不是为list每个元素写一个switch case语句，是否有更紧凑的编写方式？ 我的推理是针对未来名单的增长。 那么Python中没有switch / case语句。 对于一个小list ，你想使用if / elif ： def do_stuff(
This question already has an answer here: Replacements for switch statement in Python? 44 answers Fixing your Bugs You need to add a comma at the end of each item: 1: "Jan", 2: "Feb", Working program: def switch_demo(var): switcher = { 1: "Jan", 2: "Feb", 3: "March", 4: "April", 5: "May",
这个问题在这里已经有了答案： 替代Python中的switch语句？ 44个答案 修复你的错误 您需要在每个项目的末尾添加逗号： 1: "Jan", 2: "Feb", 工作计划： def switch_demo(var): switcher = { 1: "Jan", 2: "Feb", 3: "March", 4: "April", 5: "May", 6: "June", 7: "July",
Possible Duplicate: Replacements for switch statement in python? Given this method : def getIndex(index): if((index) < 10): return 5 elif(index < 100): return 4 elif(index < 1000): return 3 elif(index < 10000): return 2 elif(index < 100000): return 1 elif(index < 1000000): return 0 I want to make it in
可能重复： python中switch语句的替代？ 鉴于此方法： def getIndex(index): if((index) < 10): return 5 elif(index < 100): return 4 elif(index < 1000): return 3 elif(index < 10000): return 2 elif(index < 100000): return 1 elif(index < 1000000): return 0 我希望以开关盒的形式制作，但是，Python不支持开关盒。
This question already has an answer here: Replacements for switch statement in Python? 44 answers 有一个包含给定p的y值的字典p={"A":10,.....} y=dict[p] There is no possibility to shorten this piece of code. As you may have noticed, python does not provide any switch-case statement. Depending on your usage, you could change it to a dictionary or recalculate it by value: values = { "A": 10,
这个问题在这里已经有了答案： 替代Python中的switch语句？ 44个答案 有一个包含给定p的y值的字典p={"A":10,.....} y=dict[p] 没有可能缩短这段代码。 正如您可能已经注意到的那样，python不提供任何switch-case语句。 根据您的使用情况，您可以将其更改为字典或按值重新计算： values = { "A": 10, "B": 11, "C": 12, "D": 13, "E": 14, "F": 15 } y = values[p] 要么 y = ord(p) - ord("A") + 10 使用字典： choic
Possible Duplicate: Replacements for switch statement in python? I'm making a little console based application in Python and I wanted to use a Switch statement to handle the users choice of a menu selection. What do you vets suggest I use. Thanks! Dispatch tables, or rather dictionaries. You map keys aka. values of the menu selection to functions performing said choices: def AddR
可能重复： python中switch语句的替代？ 我在Python中制作了一个基于控制台的应用程序，我想使用一个Switch语句来处理用户选择菜单选项。 你的兽医建议我用什么。 谢谢！ 调度表，或者说是字典。 你也可以映射钥匙。 菜单选择的值到执行所述选择的功能： def AddRecordHandler(): print("added") def DeleteRecordHandler(): print("deleted") def CreateDatabaseHandler(): print("done")
This question already has an answer here: Replacements for switch statement in Python? 44 answers While the official docs are happy not to provide switch, I have seen a solution using dictionaries. For example: # define the function blocks def zero(): print "You typed zero.n" def sqr(): print "n is a perfect squaren" def even(): print "n is an even numbern" def prime():
这个问题在这里已经有了答案： 替代Python中的switch语句？ 44个答案 虽然官方文档很乐意不提供切换，但我看到了使用字典的解决方案。 例如： # define the function blocks def zero(): print "You typed zero.n" def sqr(): print "n is a perfect squaren" def even(): print "n is an even numbern" def prime(): print "n is a prime numbern" # map the inputs to the function blocks options
When I have a cursor, I know I can safely execute a query as follows: cur.execute("SELECT * FROM foo WHERE foo.bar = %s", (important_variable,)) Is there any way to just get the string safely without executing the query? For example, if important_variable is a string, like "foo 'bar' "baz" , I'd want the appropriately escaped one: "SELECT * FROM foo WHERE foo.bar =
当我有一个游标时，我知道我可以安全地执行一个查询，如下所示： cur.execute("SELECT * FROM foo WHERE foo.bar = %s", (important_variable,)) 有什么方法可以安全地获取字符串而不执行查询？ 例如，如果important_variable是一个字符串，例如"foo 'bar' "baz" ，我想要适当地转义一个： "SELECT * FROM foo WHERE foo.bar = "foo 'bar' "baz" （或者任何适当的转义，我甚至不确定）。 我正在使
There is a string, for example EXAMPLE How can I remove the middle character ie M from it. I don't need the code, what I want to know is Do strings in python end in any special character? Which is a better way - shifting everything right to left starting from the middle character OR creation of a new string and not copying the middle character? In Python, strings are immutable, so yo
有一个字符串，例如EXAMPLE 我如何从中删除中间字符，即M 我不需要代码，我想知道的是 python中的字符串以任何特殊字符结束？ 哪一种更好的方法 - 从中间字符开始，将所有内容从右向左移动，或者创建一个新字符串，而不是复制中间字符？ 在Python中，字符串是不可变的，所以你必须创建一个新的字符串。 你有几个如何创建新字符串的选项。 如果你想删除所有出现的'M'： newstr = oldstr.replace("M", "")