Embeddable Workflow/BPM Library For Python?

Let's say you are building a Python-based web app that requires some workflow management such as that in jBPM or Windows Workflow Foundation. Is there a library that offers this in the Python world? Oh yes, tons. But most of them depend on a specific framework. DCWorkflow is integrated with Zopes CMF, for example. hurry.workflow is for Zope 3, etc. SpiffWorkflow presumes sql-alchemy, et

嵌入式工作流/ BPM库的Python?

假设您正在构建一个基于Python的Web应用程序,它需要一些工作流程管理,如jBPM或Windows Workflow Foundation中的工作流程管理。 有没有一个库在Python世界中提供这个功能? 哦,是的,吨。 但其中大多数依赖于特定的框架。 例如,DCWorkflow与Zopes CMF集成。 hurry.workflow适用于Zope 3等.SpiffWorkflow假定了sql-alchemy等。这是因为你需要有一些东西来应用工作流程,这意味着你需要对你使用的对象做一些基本的假设。

How to send email attachments?

I am having problems understanding how to email an attachment using Python. I have successfully emailed simple messages with the smtplib . Could someone please explain how to send an attachment in an email. I know there are other posts online but as a Python beginner I find them hard to understand. Here's another: import smtplib from os.path import basename from email.mime.application i

如何发送电子邮件附件?

我在理解如何使用Python向附件发送电子邮件时遇到问题。 我已成功通过smtplib发送简单消息。 有人可以解释如何在电子邮件中发送附件。 我知道在网上有其他帖子,但作为一个Python初学者,我发现他们很难理解。 这是另一个: import smtplib from os.path import basename from email.mime.application import MIMEApplication from email.mime.multipart import MIMEMultipart from email.mime.text import MIMEText from e

Python debugging tips

What are your best tips for debugging Python? Please don't just list a particular debugger without saying what it can actually do. Related What are good ways to make my Python code run first time? - This discusses minimizing errors PDB You can use the pdb module, insert pdb.set_trace() anywhere and it will function as a breakpoint. >>> import pdb >>> a="a string"

Python调试技巧

调试Python的最佳技巧是什么? 请不要仅仅列出特定的调试器,而不会说明它实际上可以做什么。 有关 什么是让我的Python代码第一次运行的好方法? - 这讨论了最小化错误 PDB 你可以使用pdb模块,在任何地方插入pdb.set_trace() ,它将作为一个断点。 >>> import pdb >>> a="a string" >>> pdb.set_trace() --Return-- > <stdin>(1)<module>()->None (Pdb) p a 'a strin

Check if number is between given range

This question already has an answer here: Hidden features of Python [closed] 191 answers How does interval comparison work? 2 answers this is 'how exactly this statement gets executed' import dis def f(n): return 10<=n<=100 print(dis.dis(f)) which gives 6 0 LOAD_CONST 1 (10) 3 LOAD_FAST 0 (n) 6 DUP_

检查数字是否在给定范围之间

这个问题在这里已经有了答案: Python的隐藏功能[已关闭] 191个答案 区间比较如何工作? 2个答案 这是'这个语句如何被执行' import dis def f(n): return 10<=n<=100 print(dis.dis(f)) 这使 6 0 LOAD_CONST 1 (10) 3 LOAD_FAST 0 (n) 6 DUP_TOP 7 ROT_THREE 8 COMPARE_OP 1 (&l

Scripting inside a Python application

I'd like to include Python scripting in one of my applications, that is written in Python itself. My application must be able to call external Python functions (written by the user) as callbacks . There must be some control on code execution; for example, if the user provided code with syntax errors, the application must signal that. What is the best way to do this? Thanks. edit: qu

在Python应用程序中编写脚本

我想在我的一个应用程序中包含Python脚本 ,这是用Python编写的。 我的应用程序必须能够调用外部Python函数(由用户编写)作为回调函数。 代码执行必须有一些控制权; 例如,如果用户提供了带有语法错误的代码,则应用程序必须发出该信号。 做这个的最好方式是什么? 谢谢。 编辑:问题不清楚。 我需要一种类似于VBA事件的机制,其中有一个“声明”部分(您定义全局变量)和事件,以脚本代码的形式在特定点触发。 使用

How do you use the ellipsis slicing syntax in Python?

这出现在Python的Hidden特性中,但我看不到有关文档或示例能够解释特性如何工作的良好文档或示例。 You'd use it in your own class, since no builtin class makes use of it. Numpy uses it, as stated in the documentation. Some examples here. In your own class, you'd use it like this: >>> class TestEllipsis(object): ... def __getitem__(self, item): ... if item is Ellipsis:

你如何在Python中使用省略号切片语法?

这出现在Python的Hidden特性中,但我看不到有关文档或示例能够解释特性如何工作的良好文档或示例。 你会在自己的课堂上使用它,因为没有内建类使用它。 正如文档中所述,Numpy使用它。 这里有一些例子。 在你自己的班级中,你会像这样使用它: >>> class TestEllipsis(object): ... def __getitem__(self, item): ... if item is Ellipsis: ... return "Returning all items" ...

Complex switch statement

This question already has an answer here: Replacements for switch statement in Python? 44 answers 使用elif函数if x == 1: print ("case 1") elif x == 1 or x == 2: print ("case 2") elif x == 3: print ("3") elif x == 4 or x == 5: print ("4") print ("5") else: print ("default") You can use elif instead of writing else: if x == 3: And in Python, if - elif is used as switch-c

复杂的switch语句

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 使用elif函数if x == 1: print ("case 1") elif x == 1 or x == 2: print ("case 2") elif x == 3: print ("3") elif x == 4 or x == 5: print ("4") print ("5") else: print ("default") 您可以使用elif而不是写入 else: if x == 3: 在Python中, if - elif在你的重写代码中使用if - elif作为下面的switch-case 。 def run():

How to return multiple values in a function (Python)?

This question already has an answer here: Replacements for switch statement in Python? 44 answers Just use a if...else statement. I guess what you want is: def person_detail(Person): Age, Sex = Person if Age<16: return 3 if Sex else 2 else: return Sex 您可以使用多个if语句,if-else语句或字典: d = {(0, 0): 0, (0, 1): 1, (1, 0): 2, (1, 1): 3} def person_detail

如何在函数中返回多个值(Python)?

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 只需使用if...else语句。 我想你想要的是: def person_detail(Person): Age, Sex = Person if Age<16: return 3 if Sex else 2 else: return Sex 您可以使用多个if语句,if-else语句或字典: d = {(0, 0): 0, (0, 1): 1, (1, 0): 2, (1, 1): 3} def person_detail(Person): Age, Sex = Person return d[Age &

elif using dictionary but without excecute the values

This question already has an answer here: Replacements for switch statement in Python? 44 answers def functionA(a1, a2, a3): results = { 'case1': a2 / a3 if a3 != 0.0 else a2, 'case2': 1, # ... } return results[a1] However, I would advise against this approach as the entire dictionary has to be computed first only to pick up a single value. Instead, if y

elif使用字典,但没有超出值

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 def functionA(a1, a2, a3): results = { 'case1': a2 / a3 if a3 != 0.0 else a2, 'case2': 1, # ... } return results[a1] 但是,我建议不要这种方法,因为必须首先计算整个字典才能提取单个值。 相反,如果你真的想使用字典并且效率很高,我会建议: myproc = { 'case1': lambda a2, a3: a2 / a3 if a3 !=

python: Piping a value through an if/elif statement

This question already has an answer here: Replacements for switch statement in Python? 44 answers Probably not what you want, but one option is to use a dictionary of functions: def do_a(); .. def do_b(); .. def do_c(); .. strategy = { a: do_a, b: do_b c: do_c } strategy[f()]() But normally you'd want some error handling in case the dictionary entry wasn't

python:通过if / elif语句管道化一个值

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 可能不是你想要的,但一种选择是使用函数字典: def do_a(); .. def do_b(); .. def do_c(); .. strategy = { a: do_a, b: do_b c: do_c } strategy[f()]() 但是,通常情况下,如果字典条目未找到,您可能需要进行一些错误处理,在这种情况下,您最终可能会得到一个单独的变量,再加上您现在必须将每个个案提取到自己的函数