parameters - Python: pass arguments to a script - Stack Overflow To subscribe to this RSS feed, copy and paste this URL into your RSS reader. See following example with a list method name string: Nobody mentioned operator.attrgetter yet: getattr calls method by name from an object. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Any way to extract a variable name from a string value? What are the pros and cons of allowing keywords to be abbreviated? Use the Wrapper helper from python-varname: I am the author of the python-varname package. Get Parameter By Name Published by DynamoNow on February 27, 2019 A very commonly used node to read element parameter values in Revit is the Get Parameter Value by Name node. You can also specify an alternative entry point.. You bind data to the function from triggers and bindings via method attributes that use the name . Great answer, thank you :) I was trying the same approach, but failed not knowing that I have to include "self" in the actual function call again. As well as the dictionary way, it may be useful to know the following format: print '%s' % (my_url, my_url). The lambda function tests whether the value of the tested variable is the same as the value of the variable passed to variablename(). For example: Mostly as a.. challenge, I implemented your desired output. @NickT I am only aware of these methods, I don't think there are any others that fill same function as these, at least I can't think of a reason why there should be more. The functions whose names begin with "is" are mainly provided as convenient choices for the second argument to getmembers () . What syntax could be used to implement both an exponentiation operator and XOR? How to dynamically call methods within a class using method-name assignment to a variable, Executing a function by variable name in Python, Call a function from a stored string in Python. It would make no sense for objects which are never assigned to an explicit variable name. Could be made an efficient built in at some point, but here's a definition that works. feed the eval() function in order to get a reference to the actual identifier, and therefore, a reference to the real data: Unfortunately, this doesn't work in all cases. This object describes Pluggable Database Snapshots and snapshot files associated with the current instance. 2. Python does not have a main () function, so when the command to run . The only objects in Python that have canonical names are modules, functions, and classes, and of course there is no guarantee that this canonical name has any meaning in any namespace after the function or class has been defined or the module imported. Dynamical passing parameters to a function in Python. - But for redundancy, docs.python.org/3.4/library/string.html#formatstrings, rossp.org/blog/2006/jul/11/sending-e-mails-templates. class string.Formatter The Formatter class has the following public methods: format(format_string, /, *args, **kwargs) The primary API method. I was trying to figure out how to use a variable name in the name of the file to which I'm writing the results (as in writing a dataframe named 'data' to 'data.csv') which is useful in pipelines having intermediate results. If typing the '','' is too cumbersome, you could accept e.g. Scottish idiom for people talking too much, Question of Venn Diagrams and Subsets on a Book. WARNING!!! This can be done by adding an extra .f_back in the caller_local_vars initialization. It's nice to see the influence shift from ++ to #, The comment from @jaapz is no longer valid considering the changes to this answer that include the non-positional syntax, @uchuugaka The examples you added, even the "you can do this" one, has two placeholders but three arguments. But it can be done. I just told a guy off for suggesting this :) He deleting his post. Get a list of all possible variable names corresponding to an object in python, How to return the list name in for loop in Python, Get the name under which a variable or property is stored. (I say almost because I think you can get close to a solution but I do not believe there is a solution concrete enough to satisfy the exact request). I think this is the most 'general' way of solving this egg-chicken problem across arbitrary functions, modules, namespaces, without using corner-case solutions. It's not very Pythonesque but I was curious and found this solution. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. To learn more, see our tips on writing great answers. The Formatter class in the string module allows you to create and customize your own string formatting behaviors using the same implementation as the built-in format () method. Saying that it's risky to use eval with a string is saying that use of every function is risky. python - How to get a function name as a string? - Stack Overflow is there a mod of this to get the name of a passed var? You could then test every variable that needs to be greater than 5, and get the variable name in the AssertionError message. I'd like to point out a use case for this that is not an anti-pattern, and there is no better way to do it. Python - Get Function Signature - GeeksforGeeks The parent class can be got by super(self.__class__, self). It would only see the a_dictionary_object identifier name. In fact, instead of my_url, you can write an arbitrary Python expression, as long as it evaluates to a string (because of the :s formatting code). Example 1: Getting the parameter list of a method. My best guess: obj.method in Python actually calls method(self, ), in case of getattr this synthetic sugar could not be applied by Python interpreter. This is wrong. Comic about an AI that equips its robot soldiers with spears and swords, dmitri shostakovich vs Dimitri Schostakowitch vs Shostakovitch. You need to duplicate the globals dictionary since its size will change as soon as you define a new variable. locals() - Return a dictionary containing the current scope's local variables. In practice, however, there are so many potential names for an object that it's more trouble than it's worth to try to get them. How do you say "What about us?" EDIT: I have changed the wording slightly to make this more clear. Does "discord" mean disagreement as the name of an application for online conversation? Question of Venn Diagrams and Subsets on a Book, Plot multiple lines along with converging dotted line. Any ideas how? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. My explanation might be a little bit too wordy (maybe I should've used a "foo" less words), but here's how it would look in code (Note that if there is more than one variable assigned to the same value, you will get both of those variable names): If you're calling this function from another function, something like: And you want the baz instead of bar, you'll just need to go back a scope further. Then you will get only the function-related errors when you call. ;) In the 3.x branch, the module has been around since 3.1. 586), Starting the Prompt Design Site: A New Home in our Stack Exchange Neighborhood, Testing native, sponsored banner ads on Stack Overflow (starting July 6), Temporary policy: Generative AI (e.g., ChatGPT) is banned, How to get the original variable name of variable passed to a function, Getting an instance name inside class __init__(), python obtain variable name of argument in a function. Do large language models know what they are talking about? How it is then that the USA is so high in violent crime? There is something not right in Python if to obtain the name of an object we need a 5 pages answer on StackOverflow. Why "0"? It's totally possible to get the name of an instance variable, so long as it is the property of a class. Are Named Placeholders, .format(**DictObject,), an Example of Using **kwargs? We split by '?' and return the first part of split for result. 586), Starting the Prompt Design Site: A New Home in our Stack Exchange Neighborhood, Testing native, sponsored banner ads on Stack Overflow (starting July 6), Temporary policy: Generative AI (e.g., ChatGPT) is banned. The function goes through the list of IDs of values from the global scope (the namespace could be edited), finds the index of the wanted/required var or function based on its ID, and then returns the name from the list of global names based on the acquired index. Works beautifully with. python - file name as a string parameter [SOLVED] | DaniWeb Why a kite flying at 1000 feet in "figure-of-eight loops" serves to "multiply the pulling effect of the airflow" on the ship to which it is attached? Example: How could the Intel 4004 address 640 bytes if it was only 4-bit? What should be chosen as country of visit if I take travel insurance for Asian Countries, 4 parallel LED's connected on a breadboard, Do starting intelligence flaws reduce the starting skill count, Equivalent idiom for "When it rains in [a place], it drips in [another place]", Creating 8086 binary larger than 64 KiB using NASM or any other assembler, For a manual evaluation of a definite integral. This prints to the window at each call for debugging purposes and also yields a string for the written report. Using the variable names allows for clear and automatically generated reference. Oracle REST Data Services API - Get a database Data Guard property Who are you scolding and why? How do I distinguish between chords going 'up' and chords going 'down' when writing a harmony? What is the purpose of installing cargo-contract and using it to create Ink! previous_snapshot_scn (optional): integer. Incredibly scary looking but it works and it works pretty fast. get-parameter AWS CLI 1.27.165 Command Reference To subscribe to this RSS feed, copy and paste this URL into your RSS reader. I think in django models, fields are attributes of one class or instance, getting attribute names is not the same thing with converting variable name to string. Getting the name of a variable as a string, create a DataFrame in Pandas from this list, without recursively walking the tree of named objects, https://www.tutorialspoint.com/How-to-get-a-variable-name-as-a-string-in-Python, github.com/alexmojaki/sorcery/blob/master/sorcery/, Instead of relying on a variable name to carry information for you, explicitly build the mapping between the string name you want to use for the object, and the object itself.
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